Cyclization substrates and 7.alpha.-substituted 19-norsteroid de

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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Details

26023955R, 2603409AS, 2603409R, 2603453, 26034791, 2603974, 2604482B, 260586C, 260586E, 260600R, 560 55, 568648, C07J 300

Patent

active

041771974

ABSTRACT:
Novel cyclization substrates are disclosed of the formula ##STR1## wherein: (a) R.sub.1 is H or alkyl of one to four carbon atoms;

REFERENCES:
patent: 3660435 (1972-05-01), Anner et al.

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