Tetrahedron p. 13435 - 13448 (1998)
Update date:2022-08-04
Topics:
Wee, Andrew G. H.
Yu, Qing
The Rh2(OAch)4-catalyzed reaction of diazoacetate 5 provides ready access to the pivotal cyclic acetal 13 that undergoes Pictet-Spengler-type condensation with tryptamine to directly afford an epimeric mixture of the tetracyclic lactam 17a,b. Lithium aluminum hydride reduction of 17a,b provides the known tetracyclic amino alcohol 18a,b which, overall, constitutes a formal synthesis of (±)-quebrachamine.
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