Scalable Formal Synthesis of (-)-Quinocarcin

Org Lett. 2019 Jun 21;21(12):4609-4613. doi: 10.1021/acs.orglett.9b01511. Epub 2019 Jun 10.

Abstract

A scalable and unified strategy is described for the synthesis of (-)-quinocarcin, an important tetrahydroisoquinoline antitumor alkaloid. The strategy allows the practical formal synthesis of (-)-quinocarcin in 13 steps and 4.8% overall yield using N-phthaloyl-l-alanine as a chiral pool. It features the gram-scale and stereoselective synthesis of the tetrahydroisoquinoline moiety (AB ring) via Pd-catalyzed C(sp3)-H arylation and Pictet-Spengler condensation and a Cu(I)-catalyzed exo-selective [C + NC + CC] coupling reaction to generate the chiral pyrrolidine motif (D ring).

Publication types

  • Research Support, Non-U.S. Gov't