A facile five-step route to the naturally occurring CD45 protein tyrosine phosphatase
inhibitor, (Z)-pulchellalactam, with 64% overall yield has been demonstrated starting from citraconimide
(5) via regioselective NaBH4 reduction, catalytic hydrogenation, resin-catalyzed dehydration, N-BOC protection, and stereoselective condensation pathway.
CD45 PTP inhibitor - pulchellalactam - citraconimide - two reductions - resin-catalyzed
dehydration - synthesis