Process for preparing 19,11.beta.-bridged steroids

Details Process for preparing 19,11.beta.-bridged steroids Process for preparing 19,11.beta.-bridged steroids

1993-08-02

1995-08-29

Rizzo, Nicholas

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

C07J 6300

Patent

active

054461782

ABSTRACT:
A process of cyclizing compounds of formula II ##STR1## wherein K, V', R.sup.1 and 1 are as herein defined, is described whereby a compound of formula IVa is produced ##STR2## wherein K, V', R.sup.1, Q, S and 1 are as herein defined. The compounds of formula IVa are useful intermediates in the production of compounds of formula I ##STR3## wherein ring A, B, G, V, Z, R.sup.1 and R.sup.2 are as herein defined.

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patent: 5232915 (1993-08-01), Otton et al.
Grant and Hackh's Chemical Dictionary McGraw-Hill Book Company, New York, 1987 P. 14.
Hutchinson, et al. Tetrahedron Letters, 28(12) pp. 1313-1316, 1987.
Begley, et al. Tetrahedron Letters, 28(12), pp. 1317-1320, 1987.
Stork, et al. JACS, 1982, 104, 2321-2323.
Morrison and Boyd, 3rd Ed. Organic Chemistry (1979, Allyn and Bacon, Inc. Boston,) pp. 631 and 622.

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