Total Synthesis of (−)-Aspidospermine via Diastereoselective Ring-Closing Olefin Metathesis
作者:Yu-ichi Fukuda、Mitsuru Shindo、Kozo Shishido
DOI:10.1021/ol034020s
日期:2003.3.1
An enantiocontrolled totalsynthesis of (-)-aspidospermine has been achieved. The key element of the strategy is the diastereoselective construction of the quaternary stereogenic center employing 1,4-asymmetric induction during the ring-closing olefinmetathesis.
Divergent Asymmetric Total Synthesis of (+)-Vincadifformine, (−)-Quebrachamine, (+)-Aspidospermidine, (−)-Aspidospermine, (−)-Pyrifolidine, and Related Natural Products
作者:Nengzhong Wang、Shuo Du、Dong Li、Xuefeng Jiang
DOI:10.1021/acs.orglett.7b01292
日期:2017.6.16
uniformly strategic total synthesis of Aspidosperma alkaloids (+)-vincadifformine, (−)-quebrachamine, (+)-aspidospermidine, (−)-aspidospermine, (−)-pyrifolidine, and nine others from efficiently constructed tricyclic ketone 13 is reported. Highlights of these divergent and practical syntheses include (i) stereoselective intermolecular [4 + 2] cycloaddition to establish a C–E ring with one all-carbon quaternary
Enantioselective Synthesis of (−)-Vallesine: Late-Stage C17-Oxidation via Complex Indole Boronation
作者:Alyssa H. Antropow、Nicholas R. Garcia、Kolby L. White、Mohammad Movassaghi
DOI:10.1021/acs.orglett.8b01428
日期:2018.6.15
The first enantioselectivetotalsynthesis of (−)-vallesine via a strategy that features a late-stage regioselective C17-oxidation followed by a highly stereoselective transannular cyclization is reported. The versatility of this approach is highlighted by the divergentsynthesis of the archetypal alkaloid of this family, (+)-aspidospermidine, and an A-ring-oxygenated derivative, (+)-deacetylaspidospermine