Synlett 2024; 35(13): 1572-1576
DOI: 10.1055/a-2216-4882
letter

Sulfur-Mediated ipso-Cyclization of 4-(p-Methoxyaryl)alk-1-ynes Leading to 3-Thiospiro[4.5]deca-1,6,9-trien-8-ones

Meng Han
,
Pingfan Li
This work is supported by the Natural Science Foundation of Beijing Municipality (2202040).


Abstract

A new method for the intramolecular electrophilic ipso-cyclization of alkynes with triflic anhydride-activated sulfoxides, followed by demethylation with triethylamine in one pot, is described for the synthesis of 3-thiospiro[4.5]-decatrienones in moderate to good yields. This method provides a facile strategy for assembling the sulfur-substituted spirocyclic compounds.

Supporting Information



Publikationsverlauf

Eingereicht: 30. Oktober 2023

Angenommen nach Revision: 22. November 2023

Accepted Manuscript online:
22. November 2023

Artikel online veröffentlicht:
11. Januar 2024

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