Co-Catalyzed Synthesis of 1,4-Dicarbonyl Compounds Using TBHP Oxidant
作者:Feng Zhang、Peng Du、Jijun Chen、Hongxiang Wang、Qiang Luo、Xiaobing Wan
DOI:10.1021/ol5004687
日期:2014.4.4
A Co-catalyzed reaction for the construction of 1,4-dicarbonyls has been reported in which cascade organo-cobalt addition/trapping/Kornblum-DeLaMare rearrangement were involved. In view of the easy availability of starting materials, wide substrate scope, high functionality tolerance, and operational simplicity, this protocol constituted a simple, practical, and powerful alternative compared with previous approaches.
OKADA JUTARO; SHIMABAYASHI MASAHARU, CHEM. AND PHARM. BULL., 1980, 28, NO 11, 3315-3322
作者:OKADA JUTARO、 SHIMABAYASHI MASAHARU
DOI:——
日期:——
Syntheses of N-(1-methyl-2-piperazinoethyl)propionanilides and 2-alkoxy-6-(N-(1-methyl-2-(4-phenethylpiperazino)ethly)-propionamide)benzothiazoles.
作者:JUTARO OKADA、MASAHARU SHIMABAYASHI
DOI:10.1248/cpb.28.3315
日期:——
N-(1-Methyl-2-piperazinoethyl) anilines (5a-e) and 2-alkoxy-6-[1-methyl-2-(4-phenethylpiperazino) ethyl]-amino-benzothiazoles (8a-d) were prepared by the reduction of 1-(2-anilinopropionyl) piperazines (4a-e) and 1-[2-(2-alkoxy-benzothiazolyl-(6))-aminopropionyl]-4-phenethylpiperazines (7a-d). N-(1-Methyl-2-piperazinoethyl) propionanilides (6a-e) and 2-alkoxy-6-[N-[1-methyl-2-(4-phenethylpiperazino) ethyl] propionamide]-benzothiazoles (9a-d) were prepared by N-propionylation of 5a-e and 8a-d. Analgesic activity testing showed that (A) N-[1-methyl-2-(4-benzylpiperazino) ethyl]-propionanilide (6d) and N-[1-methyl-2-(4-phenethylpiperazino) ethyl] propionanilide (6e) possessed ca. 1/3 of the analgesic effect of pentazocine ; (B) N-propionylation of N-[1-methyl-2-(4-benzylpiperazino) ethyl] aniline (5d) and N-[1-methyl-2-(4-phenethylpiperazino) ethyl]-aniline (5e) increased the analgesic activity, but N-propionylation of 8a-d decreased the analgesic activity ; (C) an aniline derivative (6e) was more potent than the 2-alkoxy-6-aminobenzothiazole derivatives (9a-d).