Tetrahedron Letters p. 4001 - 4004 (1988)
Update date:2022-07-30
Topics:
Kurek-Tyrlik, Alicja
Wicha, Jerzy
Snatzke, Guenther
Reductive radical cyclization of bromomethyl-silyl-ethers 1b and 2b was found to proceed in 5-exo-mode.Epimeric cyclic siloxanes 3 were transformed stereoselectively into 20(S) 25-hydroxycholesterol.Unsaturated (E) ester 4 was converted to its (Z) isomer 7 via saturation and selective dehydrogenation.
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(1977)
