A versatile metal‐free decarboxylative reaction of glyoxylicacid monohydrate with secondary amines and alkynes to produce propargylamines has been developed. In this reaction, the carboxyl group of glyoxylicacid can enhance the activation of the alkynes to react with iminium ion intermediate without any catalysts, thus increasing the sustainability of the process.
Functionalization of aliphatic tertiary amines mediated by hexachloroethane/cat. copper: synthesis of propargylic amines and methylene-bridged bis-1,3-dicarbonyl derivatives
作者:Xiaoliang Xu、Zhichuang Ge、Dongping Cheng、Xiaonian Li
DOI:10.3998/ark.5550190.0013.810
日期:——
Copper-catalyzed functionalization of aliphatictertiaryamines with the assistance of C2Cl6 is described. This method details the alkynylation of aliphatictertiaryamines and the synthesis of methylene-bridgedbis-1,3-dicarbonylderivatives. The mechanism of the selective oxidation of aliphatictertiaryamines was also discussed. A broad spectrum of aliphatictertiaryamines was examined in this
A Highly Efficient Gold-Catalyzed Photoredox α-C(sp<sup>3</sup>)H Alkynylation of Tertiary Aliphatic Amines with Sunlight
作者:Jin Xie、Shuai Shi、Tuo Zhang、Nina Mehrkens、Matthias Rudolph、A. Stephen K. Hashmi
DOI:10.1002/anie.201412399
日期:2015.5.11
A new α‐C(sp3)H alkynylation of unactivated tertiaryaliphaticamines with 1‐iodoalkynes as radical alkynylating reagents in the presence of [Au2(μ‐dppm)2]2+ in sunlight provides propargylic amines. Based on mechanistic studies, a CC coupling of an α‐aminoalkyl radical and an alkynyl radical is proposed for the C(sp3)C(sp) bond formation. The mild, convenient, efficient, and highly selective C(sp3)H
Aerobic cross-dehydrogenative coupling of terminal alkynes and tertiary amines by a combined catalyst of Zn<sup>2+</sup>and OMS-2
作者:Xiongjie Jin、Kazuya Yamaguchi、Noritaka Mizuno
DOI:10.1039/c4ra05105j
日期:——
In the presence of ZnBr2 and a manganese oxide-based octahedral molecular sieve (OMS-2), cross-dehydrogenativecoupling of a wide range of terminalalkynes and tertiary amines to propargylamines efficiently proceeded using molecular oxygen as the terminal oxidant.