Ir(III)/MPAA-Catalyzed Mild and Selective C–H Amidation of <i>N</i>-Sulfonyl Ketimines: Access To Benzosultam-Fused Quinazolines/Quinazolinones
作者:Aniket Mishra、Upasana Mukherjee、Tripta Kumari Vats、Indubhusan Deb
DOI:10.1021/acs.joc.8b00125
日期:2018.4.6
unprecedented mild C–H amidation for weakly coordinating cyclic N-sulfonyl ketimines, accelerated by a mono protected l-amino acid, has been developed. The method uses 1,4,2-dioxazol-5-ones as the robust amidating reagent in conjunction with a catalytic amount of silver triflate. It is highlyselective and does not require a stoichiometric amount of oxidants or additives. A series of mechanistic experiments
已经开发了Ir(III)催化的空前温和的C H H酰胺化,用于弱配位的环状N-磺酰基酮亚胺,由一个单保护的1-氨基酸促进。该方法与催化量的三氟甲磺酸银一起使用1,4,2-二恶唑-5-酮作为强力酰胺化试剂。它具有很高的选择性,不需要化学计量的氧化剂或添加剂。进行了一系列的机械实验,以获取对反应机理的一些见解。该策略可轻松获得具有药学相关功能的新型苯并舒坦-喹唑啉和苯并舒坦-喹唑啉酮杂合支架。
Iridium-catalyzed direct C–H arylation of cyclic <i>N</i>-sulfonyl ketimines with arylsiloxanes at ambient temperature
作者:Writhabrata Sarkar、Arup Bhowmik、Sumit Das、Aiswarya Balaram Sulekha、Aniket Mishra、Indubhusan Deb
DOI:10.1039/d0ob01212b
日期:——
A highly efficient iridium-catalyzed ortho-selective C–H arylation of weakly coordinating cyclic N-sulfonyl ketimines has been achieved with environmentally benign aryl siloxanes at ambient temperature giving access to a novel class of biaryls.
KAMAI A.; SATTUR P. B., SYNTHESIS, 1981, NO 4, 272-273
作者:KAMAI A.、 SATTUR P. B.
DOI:——
日期:——
Pd-catalyzed [3 + 2] cycloaddition of cyclic ketimines and trimethylenemethanes toward <i>N</i>-fused pyrrolidines bearing a quaternary carbon
作者:Seoung-Mi Choi、Kyeong Do Kim、Jong-Un Park、Zi Xuan、Ju Hyun Kim
DOI:10.1039/d1ra08579d
日期:——
A Pd-catalyzed [3 + 2] cycloaddition of N-sulfonyl cyclic ketimines and trimethylenemethanes (TMM) was developed that afforded N-fused pyrrolidines bearing a quaternary carbon. Under mild reaction conditions, structurally diverse N-sulfonyl cyclic imines, including sulfamate-fused aldimines, aryl- or styryl-substituted sulfamate-derived ketimines, and N-sulfonyl cyclic ketimines, were tolerated as