Schwartz’s Reagent-Mediated Regiospecific Synthesis of 2,3-Disubstituted Indoles from Isatins
作者:A. Ulikowski、B. Furman
DOI:10.1021/acs.orglett.5b03449
日期:2016.1.15
An expeditious, functional group-tolerant synthesis of indoles from isatins is described. Isatins are treated with Grignard reagents to yield oxindoles. These, in turn, are reduced with Schwartz’s reagent and subjected to nucleophile addition and dehydration to yield 2,3-disubstituted indoles regiospecifically. This represents a divergentapproach to the synthesis of these medicinally and synthetically
Direct Functionalization of Indoles: Copper-Catalyzed Malonyl Carbenoid Insertions
作者:Michael B. Johansen、Michael A. Kerr
DOI:10.1021/ol1020948
日期:2010.11.5
Indoles, when treated with dimethyl diazomalonate under catalysis by Cu(acac)(2), undergo C-H insertion reactions regioselectively depending on the substitution pattern on the indole moiety. Indoles where the 3-position is substituted give high yields of the C2-H insertion product. Microwave conditions are also disclosed which show comparable yields with reduced reaction times.