Aluminum Chloride Promoted Hantzsch Reaction of N-Tosylhydrazones
作者:Meng Tang、Hu Wang
DOI:10.1055/s-0036-1588496
日期:2017.11
Abstract An aluminum chloride promoted Hantzsch reaction of N-tosylhydrazones has been developed. The reaction is general for a wide range of N-tosylhydrazones, and a series of 1,4-dihydropyridines (1,4-DHPs) were prepared in moderate to excellent yields. An aluminum chloride promoted Hantzsch reaction of N-tosylhydrazones has been developed. The reaction is general for a wide range of N-tosylhydrazones
Aluminum Chloride Mediated Reactions of N-Alkylated Tosylhydrazones and Terminal Alkynes: A Regioselective Approach to 1,3,5-Trisubstituted Pyrazoles
作者:Meng Tang、Yun Wang、Hu Wang、Yuanfang Kong
DOI:10.1055/s-0035-1561646
日期:——
Abstract Aluminum chloridemediated reactions of N-alkylated tosylhydrazones and terminal alkynes are reported. The protocol is applied to a wide range of substrates, and demonstrates excellent functional group tolerance. A series of 1,3,5-trisubstituted pyrazoles is prepared in good to high yields with complete regioselectivity. Aluminum chloridemediated reactions of N-alkylated tosylhydrazones and
A reaction of N,N-disubstituted hydrazones (1) with bases has been investigated. N - Methyl - N -tosylhydrazones of aliphatic carbonyl compounds have been shown to combine with primary and some secondary aliphatic amines to form α-aminodialkyldiazenes (2) hitherto unknown, and with triethylamine and alcoholic solutions of alkalies to form symmetric azines (10). Some structural factors contributing
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.