Hajra S, Bhosale SS, Hazra A, Kanaujia N. The one pot asymmetric synthesis of 3,3'-pyrrolidonyl spiroxindoles via a regio- and stereoselective domino reaction.
Org Biomol Chem 2019;
17:8140-8148. [PMID:
31432867 DOI:
10.1039/c9ob01570a]
[Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A highly efficient regio- and stereoselective domino aziridine ring opening and lactamization reaction between aziridines and 3-carboxy oxindole esters has been developed for the one pot asymmetric synthesis of 4-aryl-3,3'-spiropyrrolidonyl oxindoles with excellent selectivity (dr >99 : 1 and ee up to >99%). It was further extended to a sequential one pot protocol for the asymmetric synthesis of NH-free 3,3'-pyrrolidonyl spiroxindole, maintaining the same selectivity.
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