Muthusamy S, Naveen R, Kumar MDS. Base-mediated cascade synthesis of indole diolefins: a route to spiro[cyclopentene-indole]thiones and thiepino[2,3-
b]indoles.
Chem Commun (Camb) 2023. [PMID:
37338080 DOI:
10.1039/d3cc01870a]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/21/2023]
Abstract
Base-mediated cascade reactions of 3-hydroxymethyl-3-propenylindole-2-thiones afforded diolefins and involved deformylation, thioenolate alkylation and the thio-Claisen rearrangement. Subsequent ring-closing metathesis reactions of the diolefins furnished 3-spiro[cyclopentene-indole]-2-thiones or thiepino[2,3-b]indoles.
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