Lee S, Kim S, Yoon SH, Dagar A, Kim I. Diastereoselective Synthesis of Densely Functionalized 3a,8a-Dihydro-8
H-furo[3,2-
a]pyrrolizines through One-Pot Three-Component Assembly.
J Org Chem 2021;
86:12367-12377. [PMID:
34479403 DOI:
10.1021/acs.joc.1c01315]
[Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new domino mode of assembly was discovered from the one-pot three-component reactions of pyrrole derivatives, active methylene compounds (malononitrile, methyl cyanoacetate, or ethyl cyanoacetate), and sodium cyanide in the presence of piperidinium acetate in EtOH at room temperature, leading to a novel tricyclic skeleton in excellent yield under mild and eco-friendly conditions. This well-choreographed domino process enabled formation of multiple bonds (three C-C and one C-O) for consecutive construction of two rings (pyrrolidine and dihydrofuran) in a diastereoselective manner.
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