Journal of the Chemical Society. Chemical communications p. 1665 - 1667 (1990)
Update date:2022-09-26
Topics:
Saito, Takao
Nagashima, Masumi
Karakasa, Takayuki
Motoki, Shinichi
α,β-Unsaturated thioketones 4, 5 and 9, which are formed in situ by thionation of the corresponding ketones, undergo intramolecular hetero Diels-Alder reactions with high regio- and diastereo-selectivities (trans/cis) to give dihydrothiopyran-fused cycloadducts 6, 7 and 10.
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