Day: March 28, 2022

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 503538-69-0, is researched, SMILESS is FC1(F)OC2=CC=C(P(C3=CC=CC=C3)C4=CC=CC=C4)C(C5=C6OC(F)(F)OC6=CC=C5P(C7=CC=CC=C7)C8=CC=CC=C8)=C2O1, Molecular C38H24F4O4P2Journal, Article, Research Support, Non-U.S. Gov’t, Journal of the American Chemical Society called Silver-Catalyzed Asymmetric Sakurai-Hosomi Allylation of Ketones, Author is Wadamoto, Manabu; Yamamoto, Hisashi, the main research direction is ketone allylic silane Sakurai Hosomi allylation silver chiral phosphine; homoallylic alc asym preparation; silver chiral phosphine asym Sakurai Hosomi allylation catalyst.Name: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole.

The complex of AgF and (R)-DIFLUORPHOS has been shown to be an effective catalyst for the asym. Sakurai-Hosomi allylation of simple ketones. A significant improvement of the reactivity was observed by using THF as the solvent. The catalyst turnover was increased by addition of 1 equiv of MeOH. AgF and (R)-DIFLUORPHOS predominantly formed a 1:1 complex that provided high enantioselectivity. This catalyst system can be applied to various simple ketones, and corresponding tertiary homoallylic alcs. were obtained with excellent enantioselectivities. Only 1,2-adducts were obtained from both acyclic and cyclic conjugate ketones. The regio-, diastereo-, and enantioselective crotylation has also been achieved. E- or Z-crotyltrimethoxysilane gave a similar diastereomer ratio with high enantioselectivities. This finding introduces the utility of racemic allylsilanes for the enantioselective Sakurai-Hosomi allylation reaction.

Here is a brief introduction to this compound(503538-69-0)Name: (R)-5,5′-Bis(diphenylphosphino)-2,2,2′,2′-tetrafluoro-4,4′-bi-1,3-benzodioxole, if you want to know about other compounds related to this compound(503538-69-0), you can read my other articles.

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

SDS of cas: 27231-36-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 2-Mercapto-5-methylbenzimidazole, is researched, Molecular C8H8N2S, CAS is 27231-36-3, about A new route for the synthesis of 2-mercapto benzimidazoles. Author is Ambati, Narahari Babu; Babu, V. N. S. Ramesh; Anand, V.; Hanumanthu, P..

Bis(methylthioureido) benzenes I [R = H, Me, MeO, Cl, O2N; R1 = NHC(:S)NHMe] were prepared in 72-89% yields by treatment of benzenediamines II [R = H, Me, MeO, Cl, O2N; R1 = NH2] with Me isothiocyanate. I are refluxed in 1,4-dioxane to give benzimidazolethiols II (R = H, Me, MeO) in 89-92% yields and N,N’-dimethylthiourea as a side product.

Here is a brief introduction to this compound(27231-36-3)SDS of cas: 27231-36-3, if you want to know about other compounds related to this compound(27231-36-3), you can read my other articles.

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Synthesis of furanic derivatives with CH-acid properties. Behavior of 1-(2-furyl)alkylidene derivatives of malonic acid in presence of bases, published in 1978, which mentions a compound: 3194-15-8, mainly applied to furylethylidenemalonitrile cyclodimerization; malononitrile furylethylidene cyclodimerization; tautomerism iminocyclohexenecarbonitrile derivative; cyclohexenecarbonitrile imino preparation tautomerism, Quality Control of 1-(Furan-2-yl)propan-1-one.

Reaction of MeCR:C(CN)2 (R = 2-furyl) with an equimol amount MeONa in MeOH for 8 h at 20° gave 63% the cyclodimer I. Spectral data showed that I exists as a tautomeric mixture EtCR:C(CN)2 did not undergo similar dimerization reaction.

Here is a brief introduction to this compound(3194-15-8)Quality Control of 1-(Furan-2-yl)propan-1-one, if you want to know about other compounds related to this compound(3194-15-8), you can read my other articles.

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Evindar, Ghotas; Batey, Robert A. published the article 《Parallel Synthesis of a Library of Benzoxazoles and Benzothiazoles Using Ligand-Accelerated Copper-Catalyzed Cyclizations of ortho-Halobenzanilides》. Keywords: halo benzanilide cyclization benzoaxazole benzothiazole preparation.They researched the compound: 2-Ethylbenzo[d]oxazole( cas:6797-13-3 ).Application of 6797-13-3. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:6797-13-3) here.

A general method for the formation of benzoxazoles via a copper-catalyzed cyclization of o-halobenzanilides is reported. This approach complements the more commonly used strategies for benzoxazole formation which require 2-aminophenols as substrates. The reaction involves an intramol. C-O cross-coupling of the o-halo anilides and is believed to proceed via an oxidative insertion/reductive elimination pathway through a Cu(I)/Cu(III) manifold. The reaction is also applicable to the formation of benzothiazoles. A variety of ligands including 1,10-phenanthroline and N,N’-dimethylethylenediamine ligand acceleration/stabilization in the reaction. Optimal conditions for cyclization used a catalyst combination of CuI and 1,10-phenanthroline (10 mol %). The method was amenable to a parallel-synthesis approach, as demonstrated by the synthesis of a library of benzoxazoles and benzothiazoles substituted at various positions in the ring. Most examples used the cyclization of o-bromo anilides, but o-iodo anilides and o-chloro anilides also undergo a reaction under these conditions. The rate of reaction of the o-halo anilides follows the order I > Br > Cl, consistent with oxidative addition being the rate-determining step.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2-Ethylbenzo[d]oxazole, is researched, Molecular C9H9NO, CAS is 6797-13-3, about Novel and efficient heterogeneous polymer supported copper catalyst for synthesis of 2-substituted Benzoxazoles from 2-Haloanilides.Product Details of 6797-13-3.

A novel polymer supported copper complex was prepared by the immobilization of copper iodide on chem. modified polyacrylonitrile and its application in heterogeneous catalysis was described. The catalyst was prepared by easy method via synthetic modification of Polyacrylonitrile (PAN) using ethylene diamine followed by the complexation with CuI. After characterization, the complex was explored as a green and efficient heterogeneous catalyst for the synthesis of 2-benzoxazoles from 2-haloanilides. The reaction was performed without adding addnl. ligand and the catalyst shows activity over a broad range of substrates with quant. product yields. The catalyst was easily recovered by simple filtration and reused successfully for further cycle.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem