Three-Component Tandem Reaction Involving Acid Chlorides, Terminal Alkynes, and 2-Aminoindole Hydrochlorides: Synthesis of α-Carboline Derivatives in Aqueous Conditions via Regioselective [3 + 3] Cyclocondensation
作者:Sahaj Gupta、Brijesh Kumar、Bijoy Kundu
DOI:10.1021/jo201994v
日期:2011.12.16
An efficient synthesis toward highly diversified a-carboline derivatives via a three-component tandem reaction using acid chlorides, terminal allcynes, and 2-aminoindole hydrochlorides has been described. The salient feature of the one-pot strategy involves regioselective [3 + 3]-cyclocondensation and the presence of water in the reaction medium to facilitate cyclizafion. Nonaqueous conditions furnished products in poor yields.
Complementary regioselective synthesis of 3,5-disubstituted isoxazoles from ynones
作者:Xiaochen Liu、Dongsub Hong、Zhigang She、William H. Hersh、Barney Yoo、Yu Chen
DOI:10.1016/j.tet.2018.09.043
日期:2018.11
dehydration. The two routes are not only both highly regioselective, but also complementary to each other as a pair of regioisomeric 3,5-disubstituted isoxazoles are readily prepared from one single ynone substrate. The efficiency of the two routes are further evaluated and demonstrated in the synthesis of three representative 3,5-disubstituted isoxazoles.