Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1990-04-02
1991-06-11
Ivy, C. Warren
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C07D31300
Patent
active
050233483
ABSTRACT:
A process for preparing a compound of formula (I) ##STR1## (where (i) R.sup.1 is an ethoxy group and R.sup.2 is a hydrogen atom, (ii) R.sup.1 is a hydrogen atom and R.sup.2 is a bromine atom or (iii) (R.sup.1 and R.sup.2 together with the carbon atom to which they are attached represent>C.dbd.O) which comprises stereoselectively reducing the corresponding 5-keto compound.
REFERENCES:
patent: 4203976 (1980-05-01), Fisher et al.
patent: 4423209 (1983-12-01), Mrozik
Freeman Stephen
Pereira Oswy Z.
Ramsay Michael V. J.
American Cyanamid Company
Ivy C. Warren
Owens Amelia A.
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