Organic compounds -- part of the class 532-570 series – Organic compounds – Cyclopentanohydrophenanthrene ring system containing
Reexamination Certificate
2007-05-08
2007-05-08
Qazi, Sabiha N. (Department: 1616)
Organic compounds -- part of the class 532-570 series
Organic compounds
Cyclopentanohydrophenanthrene ring system containing
C552S559000
Reexamination Certificate
active
10847846
ABSTRACT:
This invention discloses a novel method for the conversion of carboxylic acids to carbothioic acids and application of the method to the preparation of androstane carbothiolates, such as fluticasone propionate, which avoids column chromatography.
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Barkalow Jufang
Chamberlin Steven A.
Cooper Arthur J.
Hossain Azad
Hufnagel John J.
Abbott Laboratories
Corbin Johanna M
Qazi Sabiha N.
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