Stereoselective Synthesis of Polycyclic Thiopyrans

[摘要]：The reaction of benzothiete (1) and the bicyclic alkenes 5, 7, 9, or 12 shows a very high p side selectivity (de > 95%) in the formation of the polycyclic thiopyrans 6, 8, 10, 11, 13, and 14.

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