Mixed anhydrides and processes thereof
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United States of America Patent
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Feb 12, 1985
Issued Date -
N/A
app pub date -
Feb 22, 1983
filing date -
Jul 21, 1981
priority date (Note) -
Expired
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Abstract
Mixed anhydrides products are described. These mixed anhydrides are produced by reaction of a carboxylic acid-containing steroid with a material having the formula: ##STR1## wherein: X is a halogen Z is an oxygen or sulfur R is a hydrocarbon in an inert organic solvent containing a Lewis base. These mixed anhydrides may in turn be reacted with, for example, an alcohol ammonia or amine to produce the corresponding ester or amide steroid.
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