期刊
CHEMICAL COMMUNICATIONS
卷 57, 期 18, 页码 2313-2316出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc08083g
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An efficient method for constructing enantioenriched spiro[benzofuro-cyclopenta[1,2-b]indole-indoline] scaffolds via consecutive cyclization is described. The resulting scaffolds possess five successive chiral stereogenic centers and two spiroheterocycles, with high yields and enantiomeric excess.
An efficient method to construct enantioenriched spiro[benzofuro-cyclopenta[1,2-b]indole-indoline] scaffolds via consecutive cyclization is described here. The new scaffolds possess five successive chiral stereogenic centers and two spiroheterocycles. A range of highly enantioenriched scaffolds has been obtained with up to 93% yield, 99% ee and >19 : 1 d.r. catalyzed by Bronsted acid catalysts.
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