The reaction of lithiated aldimines, prepared from activated amides, with epoxides leads to good yields of 2-aminotetrahydrofurans (neutral hydrolysis) and 2-hydroxytetrahydrofurans (acid hydrolysis). Various epoxides were examined.
6,8-Dimethylpyrimido[4,5-c]pyridazine-5,7(6H,8H)-dione: a novel method of pyrrole-ring annulation to an azine nucleus based on a tandem SNH–SNH process
作者:Anna V Gulevskaya、Denis V Besedin、Alexander F Pozharskii、Zoya A Starikova
DOI:10.1016/s0040-4039(01)01163-7
日期:2001.8
6,8-Dimethylpyrimido[4,5-c]pyridazine-5,7(6H,8H)-dione has been shown to react with some secondary amines in the presence of an oxidant to produce 6,8-dimethylpyrrolo[2 ' ,3 ' ;3,4]pyridazino[6,5-d]pyrimidine-7,9(6H,SH)-dione derivatives. The reaction represents a new method of pyrrole-ring annulation to an azine nucleus via a tandem S-N(H)-S-N(H) process. (C) 2001 Elsevier Science Ltd. All rights reserved.
Etude comparative de la photoreactivite d'enamides et de thioenamides aromatiques tertiaires
作者:A. Couture、R. Dubiez、A. Lablache-Combier
DOI:10.1016/s0040-4020(01)91137-8
日期:1984.1
Bequeme Darstellung von reinen N-Methylalkylaminen durch Zink/Salzsäure-Reduktion von 1,3,5-Tris(alkyl)-hexahydro-1,3,5-triazinen
作者:Mohammed Al Shaik、Herbert Oelschläger
DOI:10.1002/ardp.19843170306
日期:——
N‐Methyl‐alkylamine können bequem und rasch über die 1,3,5‐Tris(alkyl)‐hexahydro)‐1,3,5‐triazine durch Reduktion mit Zink/Salzsäure bei −5° im Zutropfverfahren gewonnen werden. Die Reinheit (GC) beträgt ∼ 95%.