A Novel Three-Component Reaction of Allenoates, Isocyanides, and Carboxylic Acids: Facile Synthesis of Highly Substituted Acryl Imide Derivatives
作者:Xian Huang、Feng Sha
DOI:10.1021/jo702382h
日期:2008.2.1
A novel synthesis of highly substituted acryl imide derivatives by the three-component reaction of allenoates, isocyanides, and carboxylicacids was reported, and the intramolecular cyclization reaction of allenoic acids with isocyanides was also described.
Efficient synthesis of 1,2-bis(alkoxycarbonyl)pyrazol-3-ones from 2,3-allenoic acids, azodicarboxylates and PPh3
作者:Ruizhi Lü、Xin Cheng、Xingliang Zheng、Shengming Ma
DOI:10.1039/c3cc48215d
日期:——
An efficient cascade reaction of 2,3-allenoic acids with dialkylazodicarboxylate in the presence of PPh3 affording 1,2-bis(alkoxycarbonyl)pyrazol-3-ones in moderate yields has been developed. The reaction may proceed via the intramolecular Michael addition of the expected 2,3-allenoyl hydrazines.
The Renaissance of an Old Problem: Highly Regioselective Carboxylation of 2-Alkynyl Bromides with Carbon Dioxide
作者:Bukeyan Miao、Gen Li、Shengming Ma
DOI:10.1002/chem.201503494
日期:2015.11.23
A steric effect‐controlled, zinc‐mediated carboxylation of different 2‐alkynyl bromides under an atmosphericpressure of CO2 has been developed by careful tuning of different reaction parameters, including the metal, solvent, temperature, and additive. 2‐Substituted 2,3‐allenoic acids were afforded from primary 2‐alkynyl bromides, whereas the carboxylation of secondary 2‐alkynyl bromides yielded 3‐alkynoic