Helvetica Chimica Acta p. 1501 - 1505 (1989)
Update date:2022-08-16
Topics:
Hakimelahi, Gholam H.
Jarrahpour, Ali A.
Th synthesis of Δ1-carbapenem and two β-lactams possessing a Br-atom at the N-substituting center not involved in the lactam ring and bearing the carboxyl group is described.The β-lactams having this kind of Br-substitution are more susceptible to nucleophilic attack than those having a conjugated double bond with the N-atom of the β-lactam ring.DBU is found to be an excellent reagent for the elimination of the silyloxy function.Moreover, a simple method for the addition of diethyl phosphite to an α,β-unsaturated double bond using a catalytic amount of NaH is described.
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