RAPID ASSEMBLY OF POLYCYCLIC STRUCTURES VIA SIGMATROPIC REARRANGEMENT OF S-PROPARGYL XANTHATES

[摘要]：Upon heating in chlorobenzene, propargyl xanthates yield the corresponding 4,5-bis(alkylidene)-1,3-dithiolan-2-ones which are trapped by unactivated olefins in an intramolecular Diels-Alder cycloaddition yielding interesting polycyclic structures.

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