Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 88, Issue 2, Pages 1093-1106Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.2c02561
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Spiro[indole-3,3'-pyrrolidine]-2'-ones were synthesized via one-pot chloroformylation-dearomatizing spirocyclization of tryptamine derivatives. Additionally, the thio equivalent spiro[indole-3,3'-pyrrolidine]-2'-thiones, which were previously unreported, were synthesized. The procedures are easily implemented, have a broad scope, and are transition-metal-free and cheap. To demonstrate the utility of the synthetic methodology, the spiro[indole-3,3'-pyrrolidine]-2'-ones were converted into heterocyclic scaffolds, such as an optically active spiroindoline and spirooxindole.
Spiro[indole-3,3 '-pyrrolidine]-2 '-ones were synthesized via one-pot chloroformylation-dearomatizing spirocyclization of tryptamine derivatives. Moreover, the thio equivalent spiro[indole-3,3 '-pyrrolidine]-2 '-thiones, for which the synthesis and properties were previously unreported, were synthesized. The procedures are easily implemented, have a broad scope, and are transition-metal-free and cheap. To demonstrate the utility of the synthetic methodology, the spiro[indole-3,3 '-pyrrolidine]-2 '-ones were converted into heterocyclic scaffolds, such as an optically active spiroindoline and spirooxindole.
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