O-Methyl oximes have been employed as nucleophiles in reactions with ketenimines derived from sulfonylazides and terminal alkynes to form N-alkylidene N′-tosylacetimidamide derivatives. The optimized conditions involved the use of CuPF6 and i-Pr2NEt in MeCN at 65 °C. Both O-methyl aldoximes and ketoximes were tolerated under the optimum conditions.
modern organic synthesis, chemoselectivity is recognized as an important factor in the development of new methodologies. Chemoselective nucleophilic addition to amide carbonyl centers is a challenge because classical methods require harsh reaction conditions to overcome the poor electrophilicity of the amide carbonyl group. We have successfully developed a reductive nucleophilic addition of mild nucleophiles
Palladium-catalyzed decarboxylative acylation of O-methyl ketoximes with α-keto acids
作者:Minyoung Kim、Jihye Park、Satyasheel Sharma、Aejin Kim、Eonjeong Park、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1039/c2cc38433g
日期:——
A mild, practical and efficient palladium-catalyzed decarboxylative ortho-acylation of O-methyl ketoximes with α-keto acids via CâH bond activation is described. In these reactions, a broad range of O-methyl ketoximes and α-keto acids undergoes the decarboxylative cross-coupling reactions with high selectivities and good tolerance.
Ir-Catalyzed Cascade C–H Fusion of Aldoxime Ethers and Heteroarenes: Scope and Mechanisms
作者:Zhiqian Yu、Yan Zhang、Junbin Tang、Luoqiang Zhang、Qianhui Liu、Qian Li、Ge Gao、Jingsong You
DOI:10.1021/acscatal.9b04274
日期:2020.1.3
of phenanthridine derivatives is achieved by an iridium-catalyzed direct fusion of oxime ethers and heteroarenes, which is a successful example of a cascade C–H/C–H cross-coupling/cyclization strategy for polycyclic heteroaromatic synthesis. By subtle tuning of the reaction conditions, both benzo- and simple five-membered heteroarenes are suitable substrates under similar but different conditions. The
通过铱催化肟醚和杂芳烃的直接融合,可实现菲啶衍生物的简明合成,这是多环杂芳族合成的级联C–H / C–H交叉偶联/环化策略的成功实例。通过微调反应条件,在相似但不同的条件下,苯并五元杂芳基和简单的五元杂芳基都是合适的底物。关键是正确选择银盐。详细的机理研究表明,第一步C–H / C–H交叉偶联步骤涉及[Ir II ] – [Ir IV ]催化循环,需要Ag 2 O作为氧化剂。对于第二个环化步骤,自由基过程控制了苯并杂芳烃和Ag 2的反应O是必需的;然而,在涉及[Ir I ]-[Ir III ]催化循环的简单五元杂芳烃的反应中,C–H环化作用是必要的,而AgTFA是必需的。
HIV Integrase inhibitors
申请人:——
公开号:US20030176495A1
公开(公告)日:2003-09-18
The present invention relates to the inhibition of HIV integrase, and to the treatment of AIDS or ARC by administering compounds of the following formula, or a tautomer of said compound, or a pharmaceutically acceptable salt, solvate or prodrug thereof:
1
wherein R
1
, R
2
and B
1
are as defined herein.