Electrochemical oxidative C(sp<sup>3</sup>)–H azolation of lactams under mild conditions
作者:Zhaohua Wan、Dan Wang、Zixuan Yang、Heng Zhang、Shengchun Wang、Aiwen Lei
DOI:10.1039/d0gc00687d
日期:——
Lactam-containing structural compounds are ubiquitous in drugs and biomolecules. An electrochemical oxidative direct C(sp3)–H azolation of lactams has been reported under metal catalyst-free and external chemical oxidant-free conditions. This electrochemical C(sp3)–H/N–H coupling is characterized by its broad substrate scope of azoles and lactams under mild conditions at room temperature. Mechanistic studies suggested
The conversion of secondary into tertiary amides using benzotriazole methodology
作者:Alan R. Katritzky、Guowei Yao、Xiangfu Lan、Xiaohong Zhao
DOI:10.1021/jo00060a025
日期:1993.4
N-Alkyl-N-[1-(benzotriazol-1-yl)alkyl]amides, easily prepared from benzotriazole, an aldehyde, and a secondary amide, react readily with organozinc reagents to give tertiary amides in moderate to good yields. They are also reduced by LiAlH4 to afford tertiary amines.
Katritzky, Alan R.; Toader, Dorin; Jiang, Jinlong, Organic Preparations and Procedures International, 1995, vol. 27, # 2, p. 179 - 184
作者:Katritzky, Alan R.、Toader, Dorin、Jiang, Jinlong
DOI:——
日期:——
A General and Convenient Synthesis of <i>N</i>-[(1. Diphenyl-oxophosphinyl)alkyl]carboxamides and Sulfamide
作者:Alan R. Katritzky、Hong Wu、Linghong Xie
DOI:10.1080/00397919508012682
日期:1995.4
Abstract A wide range of title compounds were prepared in good yields by amidoalkylation of ethyl diphenylphosphinite with readily available N-α-(benzotriazol-1-yl)alkyl]amides. A more convenient direct one-pot amidoalkylation of ethyl diphenylphosphinite with an amide, an aldehyde and benzotriazole is described.
A Lewis acid promoted intramolecular Schmidtreaction of N-acylbenzotriazoles with alkyl azides was designed and realized. The benzotriazole was not only employed as an efficient activator for initiating the Schmidt rearrangement but also used as a powerful terminator for the subsequent nucleophilic trapping of the isocyanate ion and/or N-acyliminium ion from the rearrangement. Thirteen δ-azido N-acylbenzotriazoles