Tetrahedron Letters p. 6519 - 6522 (1995)
Update date:2022-08-03
Topics:
Ohmori
Nishiyama
Yamamura
Synthetic process towards the bottom half portion of C20 oxygenated series of bryostatins is described. The stereogenic center at C20 position was constructed through a hydroxyl group-directed epoxidation by using mCPBA. It was found that silver (I) salt is an effective and mild reagent for regioselective ring cleavage of α-bromoepoxides into the corresponding α-hydroxyketones via oxonium ion intermediates.
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