Room Temperature Allenation of Terminal Alkynes with Aldehydes
作者:Junzhe Xiao、Yifan Cui、Can Li、Haibo Xu、Yizhan Zhai、Xue Zhang、Shengming Ma
DOI:10.1002/anie.202109879
日期:2021.12
Au(SIPr)NTf2 has been identified for the roomtemperature ATA reaction to afford diverse 1,3-disubstituted allenes with 1-methyl-1,2,3,4-tetrahydroisoquinoline as amine and aldehyde and TFE or HFIP as the mediator. A formal synthesis of (−)-centrolobine and synthetic transformations have been demonstrated.
Au(SIPr)NTf 2已被确定用于室温 ATA 反应,以提供不同的 1,3-二取代丙二烯,1-甲基-1,2,3,4-四氢异喹啉作为胺和醛,TFE 或 HFIP 作为介体。已经证明了 (-)-ceNTrolobine 和合成转化的正式合成。
TfOH/Fe(OTf)<sub>3</sub>
Cocatalyzed Reaction of Arylallenes with Alcohols for Structurally Diverse Indene Derivatives
作者:Congrong Liu、Haiyun Zhang、Lianghui Ding、Juan Liu
DOI:10.1002/cjoc.201800099
日期:2018.8
The indene moiety is an important unit because of its presence in many chemical catalysts, functional materials and biologically relevant molecules. Herein, we report a facile reaction of arylallenes with benzylic or allylic alcohols through TfOH/Fe(OTf)3 cocatalyzed cleavage of sp3 carbon‐oxygen. In the presence of 5 mol% TfOH and 5 mol% Fe(OTf)3, a range of arylallenes undergo carbocation initiated
One-Pot Synthesis of 1,3-Disubstituted Allenes from 1-Alkynes, Aldehydes, and Morpholine
作者:Jinqiang Kuang、Shengming Ma
DOI:10.1021/ja910503k
日期:2010.2.17
catalyst for the one-step synthesis of allenesfromterminal alkynes and aldehydes with morpholine as the base in toluene. The reaction is believed to proceed via the intermediacy of propargylic amines, which was converted to allenes by a sequential hydride transfer and beta-elimination process. The reaction is applicable for both aromatic and aliphatic aldehydes. Functionalities such as halide, hydroxyl