STUDIES IN PENICILLIN CHEMISTRY. ISOLATION AND CHARACTERISATION OF METHYL 3,3-DIMETHYL-6-HYDROXY-METHYL-8-OXO-4-THIA-1,7-DIAZABICYCLO-OCTANE (A) AND 4-HYDROXYMETHYL-7,7-DIMETHYL-6-THIA-3,8-DIAZABICYCLOOCTANE-2-ONE (B)

Article abstract of DOI:10.1016/S0040-4020(01)92139-8

Reduction of diphenylmethyl benzyloxypenicillinate with borane-tetrahydrofuran gives <2R,2'R,4'S>2-benzyloxy-carbonylamino-2-<5',5'-dimethyl-4'-diphenylmethylcarboxy-2'-thiazolidine>-ethanol (5) as the main product.Treatment of this compound with methanol