Process for preparing sildenafil

Details Process for preparing sildenafil Process for preparing sildenafil

1997-06-06

1999-09-21

Berch, Mark L.

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

Organic compounds

Pteroyl per se or having -c-, wherein x is chalcogen, bonded...

548371, 548383, C07D24702, C07D24700, C07D29526

Patent

active

059556110

ABSTRACT:
A process for the preparation of a compound of formula (I): ##STR1## which comprises cyclization of a compound of formula (II): ##STR2##

REFERENCES:
Harriet W. Hamilton, et al. J. Med. Chem. 1987, 30, 91-96.

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