Enantioselective construction of the tricyclic core of curcusones A–D <i>via</i> a cross-electrophile coupling approach
作者:Austin C. Wright、Brian M. Stoltz
DOI:10.1039/c9sc04127c
日期:——
Herein we report our recent progress toward the enantioselective total synthesis of the diterpenoid natural products curcusones A–D by means of complementary Stetter annulation or ring-closing metathesis (RCM) disconnections. Using the latter approach, we have achieved the concise construction of the 5–7–6 carbocyclic core embedded in each member of the curcusone family. Essential to this route is
Synthesis of the Zoanthamine ABC Ring System: Some Surprises from Intramolecular Diels−Alder Reactions
作者:Martin Juhl、Thomas E. Nielsen、Sebastian Le Quement、David Tanner
DOI:10.1021/jo0520691
日期:2006.1.1
total synthesis of the marine alkaloids zoanthamine and norzoanthamine, an elaborate model study was conducted starting from (−)-carvone. In nine steps alkenyl iodides corresponding to the C11−C24 fragment of zoanthamine were obtained. The alkenyl iodides were coupled to various stannanes (C6−C10 fragment) via the Corey modification of the Stille reaction, affording a variety of Diels−Alder precursors