Syntheses of hitherto unreported heterocycles, such as oxathiocine
derivatives, in excellent yields, and a doubly cyclized oxathiocine
derivative, through a Wittig olefination and intramolecular Heck
reaction sequence via an unusual 8-endo-trig
cyclization, are reported.
Wittig olefination - intramolecular Heck reaction - palladium catalyst - oxathiocine
- 8-endo-trig