Month: October 2022

On January 10, 2020, Ge, Bailu; Peng, Yanling; Liu, Jing; Wen, Si; Peng, Cheng; Cheng, Guolin published an article.Reference of 7-Bromo-2-phenylbenzo[d]oxazole The title of the article was Acid-promoted cleavage of the C-C double bond of N-(2-hydroxyphenyl)enaminones for the synthesis of benzoxazoles. And the article contained the following:

An acid-mediated selective cleavage of C-C double bond of N-(2-hydroxyphenyl)enaminones (Z)-2-OHR1C6H3NHC(R2)=CHC(O)R (R = Ph, t-Bu, thiophen-2-yl, etc.; R1 = H, 4-Me, 5-F, 3-Br, etc.; R2 = Ph, cyclopropyl, Me, etc.) with formation of a new C-O bond for the synthesis of 2-substituted benzoxazoles I (R3 = H, 6-Me, 5-F, 7-Br, etc.) has been developed. This protocol proceeds under transition metal- and oxidant-free conditions with broad functional group tolerance. The oxidative cleavage of C-C double bond of N-(2-hydroxyphenyl)enaminone is also realized using NCS or NFSI as oxidants with release of 2,2-dichloro-1-(3-methoxyphenyl)ethanone, 2,2-difluoro-1-(3-methoxyphenyl)ethanone resp. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Reference of 7-Bromo-2-phenylbenzo[d]oxazole

The Article related to benzoxazole preparation, enaminone hydroxyphenyl bond cleavage, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Reference of 7-Bromo-2-phenylbenzo[d]oxazole

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On August 8, 2017, Cao, Jianhua; Hua, Ruimao published a patent.Computed Properties of 1268137-13-8 The title of the patent was Benzoxazole derivative and its application in organic light-emitting diode. And the patent contained the following:

The invention disclosed a kind of benzoxazole derivative, its preparation method and application in organic light-emitting diode. The claimed benzoxazole derivative is shown in structure I (Ar1,Ar2 = H, hydrogen, Ph, biphenyl, 1-naphthyl, 2-naphthyl, pyridyl, pyrenyl, anthryl, phenanthryl, or (un)substituted C2-60 heteroaryl; R1,R2,R3 = hydrogen, deuterium, straight or branched alkyl, alkoxy (un)substituted C6-60 aryl, (un)substituted C2-60 heteroaryl; L1 = (un)substituted phenylene, naphthylene, fluorenylene, spirofluorenyl, anthracenyl, pyridylene, etc. x = 0-5 integers). The claimed compound is prepared via multiple steps (procedure given). The prepared compound can be applied in organic electroluminescence device. The claimed organic electroluminescence device sequentially comprises a transparent substrate, an anode layer, a hole injection layer, a hole transport layer, an organic luminescent layer, an electron transport layer, and a cathode layer. The prepared compound has excellent electron transport capacity, can significantly reduce starting voltage, and improve luminescent efficiency and brightness, better film forming performance, simple synthesis and purification methods, and suitability for large-scale production, can be used as luminescent material, main material of luminescent layer or hole transport material. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Computed Properties of 1268137-13-8

The Article related to benzoxazole derivative preparation organic light emitting diode, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Computed Properties of 1268137-13-8

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On November 3, 2017, Huang, Jinhai; Su, Jianhua published a patent.Computed Properties of 1268137-13-8 The title of the patent was Spirofluorene type organic electroluminescent compound and organic electroluminescence device. And the patent contained the following:

The invention relates to spirofluorene type organic electroluminescent compounds of formula I, wherein X is one of N, O, S and NR14; R1 t R14 are independently H, C1-12alkyl, (un)substituted C3-30 (hetero)aryl, etc., method for their preparation and their use in organic electroluminescence device. The compound has good thermal stability, high light emission efficiency and high luminous purity, and can be used for producing organic electroluminescent device to be applied to the field of organic solar cell, organic thin film transistor or organic photoreceptor. The invention further provides an organic electroluminescence device, which comprises an anode, a cathode and an organic layer. The organic layer at least contains at least one of luminous layer, hole injection layer, hole transmission layer, hole barrier layer, electron injection layer and electron transmission layer. At least one layer of the organic layer contains the compound represented by the structural formula I. The organic electroluminescent device has the advantages of good electroluminescent efficiency, excellent color purity and long service life. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Computed Properties of 1268137-13-8

The Article related to spirofluorene organic electroluminescent compound preparation oled, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Computed Properties of 1268137-13-8

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On September 15, 2017, Huang, Jinhai; Su, Jianhua published a patent.Formula: C13H8BrNO The title of the patent was Preparation of spiroazole compounds as organic electroluminescent materials. And the patent contained the following:

The present invention provides a spiroazole organic electroluminescent compounds as shown in formula I [wherein X1 and X2 are -N=, -NR, -O-, -S-; Y1 and Y2 are -N=, -NR11, -O-, -S-, and X1 and Y1, X2 and Y2 are not simultaneously -N=; R are independently selected from H, C1-C12 alkyl, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, substituted or unsubstituted fiver- or six-membered heterocycloalkyl, substituted or unsubstituted C12-C30 diaryl amino, substituted or unsubstituted C18-C30 triarylamino, carbazolyl]. For example, compound II was prepared in a multi-step synthesis. This title compounds have good thermostability, high luminous efficiency, high luminous purity, can be used for fabricating organic electroluminescent device, used in organic solar cell, organic thin-film transistor or organic photoreceptor. (characterization data given). The organic electroluminescent device contains an anode, a cathode and an organic layer; and the organic layer contains at least one of light-emitting layer, a hole injection layer, a hole transport layer, a hole blocking layer, electron injection layer, electron transporting layer. The organic electroluminescent device has good elec. electroluminescent efficiency, excellent purity of color and long service life. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Formula: C13H8BrNO

The Article related to preparation spiroazole compound organic electroluminescent materials, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Formula: C13H8BrNO

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On July 1, 2016, Abdellaoui, Fatma; Youssef, Chiraz; Ben Ammar, Hamed; Roisnel, Thierry; Soule, Jean-Francois; Doucet, Henri published an article.Category: benzoxazole The title of the article was Palladium-Catalyzed Regioselective C-H Bond Arylations of Benzoxazoles and Benzothiazoles at the C7 Position. And the article contained the following:

We report herein, a very simple catalytic system for the direct arylation of benzoxazole and benzothiazole derivatives at C7 position, namely, phosphine-free PdCl2 associated with PivOK in NMP at 150°. (Thio)phenoxy chelation-assisted Pd-catalyzed C-H bond cleavage, from an opened intermediate, was proposed to explain this unique regioselectivity. This reaction allows the synthesis of 2-amino-6-arylphenols through the ring opening of the benzoxazole. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Category: benzoxazole

The Article related to palladium catalyst regioselective arylation benzoxazole benzothiazole, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Category: benzoxazole

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On January 21, 2022, Wang, Zheng-Hai; Wang, Dong-Hui published an article.Category: benzoxazole The title of the article was Cu-Catalyzed Synthesis of Benzoxazole with Phenol and Cyclic Oxime. And the article contained the following:

A Cu-catalyzed straightforward synthesis of benzoxazoles I [R = 5-iPr, 5-NHAc, 7-Bn, etc.; Ar = Ph, 1-naphthyl, 2-furyl, etc.] from free phenols and cyclic oxime esters was reported. The mild reaction conditions tolerate various electron-withdrawing and electron-donating functional groups on both substrates, affording benzoxazoles in moderate to good yields. With this protocol, large-scale syntheses of Ezutromid and Flunoxaprofe in one or two steps were demonstrated. A catalytic mechanism, which included Cu-catalyzed amination via inner-sphere electron transfer and consequent annulation, was proposed. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Category: benzoxazole

The Article related to benzoxazole preparation, phenol cyclic oxime ester amination copper catalyst, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Category: benzoxazole

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Shi, Wei-Min; Li, Xiao-Hua; Liang, Cui; Mo, Dong-Liang published an article in 2017, the title of the article was Base-Free Selective O-Arylation and Sequential [3,3]-Rearrangement of Amidoximes with Diaryliodonium Salts: Synthesis of 2-Substituted Benzoxazoles.COA of Formula: C13H8BrNO And the article contains the following content:

A variety of functionalized 2-substituted benzoxazoles, e.g. I, can be prepared in good yields from amidoximes and diaryliodonium salts by selective O-arylation and sequential [3,3]-rearrangement under metal-free conditions. O-arylation of amidoximes was promoted by 3 Å mol. sieves in the absence of a base and a sequential TFA-mediated [3,3]-rearrangement was used to synthesize 2-substituted benzoxazoles. Both of the O-aryl products and rearrangement products were compatible with a broad range of sensitive functional groups such as ester, aldehyde, nitro, vinyl, amine, and amide groups in addition to halides. A bidentate N-ligand with double benzoxazoles was prepared at gram-scale in two steps. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).COA of Formula: C13H8BrNO

The Article related to arylation rearrangement amidoxime diaryliodonium salt, benzoxazole preparation, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.COA of Formula: C13H8BrNO

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On August 17, 2021, Lv, Zhong published a patent.Category: benzoxazole The title of the patent was Benzoxazole derivatives and preparation thereof. And the patent contained the following:

The present invention relates to benzoxazole derivatives and preparation thereof, which have the advantages of simple method, high yield, environmental friendliness, high purity and low cost. In particular, the present invention relates to benzoxazole derivatives with the general structure I, wherein R1 = hydrogen, alkyl, halogen, cyano, nitro, carboxyl, aromatic compounds and their derivatives or condensed rings; R2 = hydrogen, alkyl, halogen, cyano, nitro, carboxyl, aromatic compounds and derivatives or condensed rings. The benzoxazole derivative was prepared by the following steps: heterocyclization of carboxylic acid substitution and the 2-aminophenol substitution to obtain the final product. The benzoxazole derivatives can be used in drug synthesis, organic electroluminescence materials, polymer materials and organic flexible materials. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Category: benzoxazole

The Article related to benzoxazole derivative preparation aminophenol carboxylic acid heterocyclization, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Category: benzoxazole

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On September 4, 2017, Kim, Hyeong Seon; Kim, Yeong Gwon; Yoo, Eun Seon; Lee, Sang Sin; Jung, Seong Hyeon; Cho, Pyeong Seok; Hong, Jin Seok published a patent.COA of Formula: C13H8BrNO The title of the patent was Preparation of oxazolocarbazole derivatives and compositions comprising them for organic optoelectronic devices and display devices. And the patent contained the following:

The present invention provides oxazolocarbazole derivatives (combinations of I and II) [R1-R6 = independently H, D, (un)substituted alkyl, cycloalkyl, aryl, heteroaryl, etc.; ET = an (un)substituted heteroaryl group containing at least one N except a carbazole group; L = single bond, (un)substituted arylene, heteroarylene, etc.; Ar1 = (un)substituted aryl, heteroaryl, etc.; two adjacent stars (*) of I bind with two stars (*) of II], compositions for organic optoelectronic devices including the compounds, organic optoelectronic devices to which the compounds or the compositions are applied, and display devices including the organic optoelectronic devices. For example, compound III (preparation given) was subjected to coupling with compound IV (preparation given) followed by cyclization using triphenylphosphine and coupling with 2-chloro-4,6-diphenyl-1,3,5-triazine to provide compound V. The invention compounds are useful for organic optoelectronic devices such as organic electroluminescent devices having high efficiency and long lifetime. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).COA of Formula: C13H8BrNO

The Article related to oxazolocarbazole derivative preparation organic optoelectronic device display device, organic electroluminescent device, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.COA of Formula: C13H8BrNO

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

On August 31, 2017, Kim, Hyung Sun; Kim, Youngkwon; Yu, Eun Sun; Lee, Sangshin; Jung, Sung-Hyun; Cho, Pyeongseok; Hong, Jinseok published a patent.Recommanded Product: 7-Bromo-2-phenylbenzo[d]oxazole The title of the patent was Preparation of oxazolocarbazole derivatives and compositions comprising them for organic optoelectronic devices and display devices. And the patent contained the following:

The present invention provides oxazolocarbazole derivatives (combinations of I and II) [R1-R6 = independently H, D, (un)substituted alkyl, cycloalkyl, aryl, heteroaryl, etc.; ET = an (un)substituted heteroaryl group containing at least one N except a carbazole group; L = single bond, (un)substituted arylene, heteroarylene, etc.; Ar1 = (un)substituted aryl, heteroaryl, etc.; two adjacent stars (*) of I bind with two stars (*) of II], compositions for organic optoelectronic devices including the compounds, organic optoelectronic devices to which the compounds or the compositions are applied, and display devices including the organic optoelectronic devices. For example, compound III (preparation given) was subjected to coupling with compound IV (preparation given) followed by cyclization using triphenylphosphine and coupling with 2-chloro-4,6-diphenyl-1,3,5-triazine to provide compound V. The invention compounds are useful for organic optoelectronic devices such as organic electroluminescent devices having high efficiency and long lifetime. The experimental process involved the reaction of 7-Bromo-2-phenylbenzo[d]oxazole(cas: 1268137-13-8).Recommanded Product: 7-Bromo-2-phenylbenzo[d]oxazole

The Article related to oxazolocarbazole derivative preparation organic optoelectronic device display device, organic electroluminescent device, Heterocyclic Compounds (More Than One Hetero Atom): Oxazoles, Isoxazoles and other aspects.Recommanded Product: 7-Bromo-2-phenylbenzo[d]oxazole

Referemce:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem