Accessing <i>N</i>-Acyl Azoles via Oxoammonium Salt-Mediated Oxidative Amidation
作者:John M. Ovian、Christopher B. Kelly、Vincent A. Pistritto、Nicholas E. Leadbeater
DOI:10.1021/acs.orglett.7b00060
日期:2017.3.17
An operationally simple, robust, metal-free approach to the synthesis of N-acyl azoles from both alcohols and aldehydes is described. Oxidative amidation is facilitated by a commercially available organic oxidant (4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxoammonium tetrafluoroborate) and proceeds under very mild conditions for an array of structurally diverse substrates. Tandem reactions of these
Synthesis of Phthalides through Tandem Rhodium-Catalyzed C-H Olefination and Annulation of Benzamides
作者:Neeraj Kumar Mishra、Jihye Park、Miji Choi、Satyasheel Sharma、Hyeim Jo、Taejoo Jeong、Sangil Han、Saegun Kim、In Su Kim
DOI:10.1002/ejoc.201600368
日期:2016.6
The rhodium(III)-catalyzed tandem C–H olefination and cyclization of benzamides with various alkenes is described. This protocol provides direct access to highly substituted phthalides, which are known as crucial frameworks of biologically active compounds. In particular, the amide directing group containing a benzimidazole group facilitates the activation of aromatic ortho-C–H bonds leading to olefination
Karnik, A. V.; Rane, J. P., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1998, vol. 37, # 11, p. 1191 - 1193
作者:Karnik, A. V.、Rane, J. P.
DOI:——
日期:——
Chemoselective acylation of benzimidazoles with phenylacetic acids under different Cu catalysts to give fused five-membered N-heterocycles or tertiary amides
作者:Shaoyu Mai、Yingwei Zhao、Qiuling Song
DOI:10.1039/c6ob01167e
日期:——
bond formation via a copper-catalyzed aerobic oxidative decarboxylative tandem protocol was realized. The phenylacetic acids which contain ortho-X (X = F or Br) on the aromatic ring will render a fused five-membered heterocycle via a tandem aromatic nucleophilic substitution and aerobic oxidative decarboxylative acylation at the C(sp2)–H bond of benzimidazoles under the Cu(OAc)2/K2CO3/BF3·Et2O catalytic
通过铜催化的好氧氧化脱羧串联方案实现了C–N键的形成。在芳环上含有邻-X(X = F或Br)的苯乙酸将通过串联芳族亲核取代和苯并咪唑的C(sp 2)-H键上的好氧氧化脱羧酰化反应,形成稠合的五元杂环在Cu(OAc)2 / K 2 CO 3 / BF 3 ·Et 2 O催化体系下,以CuBr为催化剂,吡啶为碱,发生N-酰化反应,得到叔酰胺。
Du, Jingxing; Wang, Xiaoxia; Zheng, Renwei, Journal of Chemical Research, 2007, # 1, p. 14 - 15