.beta.-lactam production
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United States of America Patent
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Aug 17, 2004
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N/A
app pub date -
Apr 10, 2002
filing date -
Apr 15, 1999
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Expired
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Abstract
A process for the production of a compound of formula ##STR1## comprising i) silylating a compound of formula ##STR2## then reacting a resulting with a compound of formula R'.sub.B S--X' IVB wherein R'.sub.B is hydrogen or trialkysilyl and X' is as defined above, in the presence of a compound of formula ##STR3## wherein R.sub.2, R.sub.3 and R.sub.4 independently of each another are aryl or alkyl, and R.sub.5 is alkyl, perfluorinated alkyl, or aryl; and isolating the desired product.
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