Journal of the Chemical Society. Chemical communications p. 411 - 413 (1992)
Update date:2022-07-29
Topics:
Saito, Takao
Nagashima, Masumi
Karakasa, Takayuki
Motoki, Shinichi
α,β-Unsaturated thiocarbonyl S-sulfides (thiosulfines) 10 were generated by sulfurization of the thioketones 5 and were intramolecularly trapped as 1,5-dipoles giving 8, whereas, in the presence of Et3N, they were transformed by trans-sulfurization via 1,5 cyclization into the thioketones 13 capable of undergoing the intramolecular hetero-Diels-Alder reaction to give cycloadducts 9.
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