Recently I am researching about BOND FORMATION; BROMINATION; IODINATION; ACTIVATION; ARENES; SITE; IODOSUCCINIMIDE; CHLORINATION; ACID; FUNCTIONALIZATION, Saw an article supported by the JSPS KAKENHIMinistry of Education, Culture, Sports, Science and Technology, Japan (MEXT)Japan Society for the Promotion of ScienceGrants-in-Aid for Scientific Research (KAKENHI) [JP 19K15586, JP 17H06092, JP 17K17720]; JST CRESTJapan Science & Technology Agency (JST)Core Research for Evolutional Science and Technology (CREST) [JPMJCR1522]. Name: 4,4′-Dibromobiphenyl. Published in AMER CHEMICAL SOC in WASHINGTON ,Authors: Nishii, Y; Ikeda, M; Hayashi, Y; Kawauchi, S; Miura, M. The CAS is 92-86-4. Through research, I have a further understanding and discovery of 4,4′-Dibromobiphenyl
A Lewis base catalyst Trip-SMe (Trip = triptycenyl) for electrophilic aromatic halogenation using N-halosuccinimides (NXS) is introduced. In the presence of an appropriate activator (as a noncoordinating-anion source), a series of unactivated aromatic compounds were halogenated at ambient temperature using NXS. This catalytic system was applicable to transformations that are currently unachievable except for the use of Br-2 or Cl-2: e.g., multihalogenation of naphthalene, regioselective bromination of BINOL, etc. Controlled experiments revealed that the triptycenyl substituent exerts a crucial role for the catalytic activity, and kinetic experiments implied the occurrence of a sulfonium salt [Trip-S(Me)Br][SbF6] as an active species. Compared to simple dialkyl sulfides, Trip-SMe exhibited a significant charge-separated ion pair character within the halonium complex whose structural information was obtained by the single-crystal X-ray analysis. A preliminary computational study disclosed that the pi system of the triptycenyl functionality is a key motif to consolidate the enhancement of electrophilicity.
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Reference:
Benzoxazole – Wikipedia,
,Benzoxazole | C7H5NO – PubChem