Water → (3aR*,10aS*)-9-Benzyl-4-((4-chlorophthalimido)acetyl)-2,3,3a,4,9,10a-hexahydrobenzo[b]cyclopenta[e][1,4]-diazepin-10(1H)-one

Participants

Reaction Steps

A suspension of (3aR*,10aS*)-4-(aminoacetyl)-9-benzyl-2,3,3a,4,9,10a-hexahydrobenzo[b]cyclopenta-[e][1,4]diazepin-10(1H)-one (0.58 g, 1.7 mmol) and 4-chlorophthalic anhydride (0.31 g, 1.7 mmol) in toluene (10 mL) was refluxed for 3.5 hours using a Dean-Stark water separator. The reaction mixture was left standing for cooling at room temperatures, to which was added hexane. The resulting solid was collected by filtration, which was recrystallized from chloroform-hexane to give 0.66 g (yield 75%) of the titled compound, m.p. 237°-238° C.

Provenance & Evidence