Tetrahedron Letters p. 2487 - 2490 (1983)
Update date:2022-08-30
Topics:
Castaldi, Graziano
Perdoncin, Giulio
Giordano, Claudio
An opposite stereoselectivity is observed in the reduction of 3α-hydroxy-5β-7-oxo-cholanic acid by alkali metals and by sodium dithionite, contrary to the results reported with other cyclic or bicyclic ketones.An electron-transfer mechanism followed by coupling of the ketyl radical with SO2(1-). is suggested for the reduction by sodium dithionite.
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