Rhodium-catalyzed decomposition of indole-substituted α-diazo-β-keto esters: three different reactions based on indole oxidation state
摘要:
Rhodium(II)-catalyzed decomposition of three indole-substituted alpha -diazo-beta -keto esters affords three different types of intramolecular reactions based on the oxidation state of the indole. (C) 2001 Published by Elsevier Science Ltd.
Compounds of formula (I)
and pharmaceutically acceptable salts thereof are agonists at the beta-2 adrenoceptor. They are useful as feed additives for livestock animals.
Michael Addition of Indoles to Enones Catalyzed by a Cationic Iron Salt
作者:Takashi Nishikata、Tsukasa Inishi、Goki Hirata
DOI:10.1055/s-0040-1705997
日期:2021.3
Indoles are one of the most valuable nucleophiles in Michaeladditionscatalyzed by a proper Lewis acid. In this paper, we found that a cationic iron salt is effective to carry out the Michaeladdition of indoles. β-Mono- and disubstituted enones reacted smoothly with indoles under our conditions. The cationic iron catalyst is very active, and the maximum TON was up to 425. Moreover, cationic iron-catalyzed