Abstract
The synthesis of 6,6-dibromo-3α-(diphenylphosphate)oxymethyl-2,2-dimethyl penam sulfone ( 3a), 6α-chloro-3α-(diphenylphosphate)oxymethyl-2,2-dimethyl penam sulfone ( 3b), benzyl 6α-(diphenyl-phosphate)oxypenicillanate sulfone ( 4) and 6,6-dibromo-3α-(methylphosphate)carbonyl-2,2-dimethylpenam sulfone ( 12) are reported. When tested as inhibitors of human leukocyte elastase, the compound 4 proved to be the most active.
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