N-Alkylation of tosylhydrazones in the presence of triphenylphosphine
摘要:
An efficient N-alkylation reaction of tosylhydrazones was developed in the presence of triphenylphosphine; triphenylphosphine played a key role in the transformation. A range of N-alkylated tosylhydrazones were prepared in good to high yields. (C) 2013 Elsevier Ltd. All rights reserved.
Regioselective Synthesis of Highly Functionalized Pyrazoles from <i>N</i>-Tosylhydrazones
作者:Qian Zhang、Meng Tang
DOI:10.1021/acs.orglett.9b00561
日期:2019.3.15
A regioselectivesynthesis of highly functionalized pyrazoles from N-tosylhydrazones was developed. The reaction was general for a wide range of substrates and demonstrated excellent tolerance to a variety of substituents, and the method has been successfully applied to the formal synthesis of ibrutinib.