Zheng H, Han Y, Sun J, Yan CG. Molecular diversity of the base-promoted reaction of phenacylmalononitriles with dialkyl but-2-ynedioates.
Beilstein J Org Chem 2022;
18:991-998. [PMID:
36051560 PMCID:
PMC9379639 DOI:
10.3762/bjoc.18.99]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 07/26/2022] [Indexed: 11/23/2022] Open
Abstract
In the presence of tetrabutylammonium bromide (TBAB), the cycloaddition reaction of phenacylmalononitriles with dialkyl but-2-ynedioates in acetonitrile at room temperature resulted in 3,3-dicyano-5-hydroxy-5-arylcyclopent-1-ene-1,2-dicarboxylates in high yields. More importantly, the DABCO-promoted domino reaction of two molecules of each phenacylmalononitrile and dialkyl but-2-ynedioate in acetonitrile at room temperature afforded unique multifunctionalized carboxamide-bridged dicyclopentenes in moderate to good yields and with high diastereoselectivity.
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