The enantioselective Diels-Alder reaction of silyloxydiene that incorporates a pyrrolidine ring was studied. This reaction was catalyzed by a chiral holmium complex and gave multi-substituted chiral hydroindoles that contained a silyl enol ether, which is a key functional group for further transformations. We demonstrate here the synthesis of chiral pyrroloacridine, dibenzodiazocine, and pyrrolocarbazole skeletons.
The enantioselective Diels-Alder reaction of silyloxydiene that incorporates a pyrrolidine ring was studied. This reaction was catalyzed by a chiral holmium complex and gave multi-substituted chiral hydroindoles that contained a silyl enol ether, which is a key functional group for further transformations. We demonstrate here the synthesis of chiral pyrroloacridine, dibenzodiazocine, and pyrrolocarbazole skeletons.
Laccase/2,2,6,6-Tetramethylpiperidinoxyl Radical (TEMPO): An Efficient Catalytic System for Selective Oxidations of Primary Hydroxy and Amino Groups in Aqueous and Biphasic Media
radical (TEMPO) catalyticsystems enable efficient aerobic oxidations of primary alcohols but they generally show a reduced reactivity in aqueousmedium. Herein, we report an oxidative catalyticsystem composed of Trametes versicolor laccase and TEMPO, which is able to work in buffer solutions at room temperature using ambient air. Although this catalyticsystem displays great efficiency in aqueous systems
Cu(II)-Catalyzed Synthesis of 4-(1,4,5,6-Tetrahydropyridin-3-yl)-1,4-dihydroisoquinolin-3-ones from 4-Diazoisoquinolin-3-ones
作者:Minghui Qi、Muhammad Suleman、Jianwei Xie、Ping Lu、Yanguang Wang
DOI:10.1021/acs.joc.1c02905
日期:2022.3.18
into β-C(sp2)–H bonds of N-sulfonyl enamides, which gave a series of 4-(1,4,5,6-tetrahydropyridin-3-yl)-1,4-dihydroisoquinolin-3(2H)-ones in good to excellent yields. Operationally simple and mild reaction conditions, a cheap catalyst, readily accessible starting materials, and a broad substrate scope are the merits of this reaction.