Asymmetric synthesis of tert -butyl ((1 R ,4a R ,8 R ,8a R )-1-hydroxyoctahydro-1 H -isochromen-8-yl)carbamate
作者:Alfonso G. Rubia、Mateo M. Salgado、Carlos T. Nieto、Alejandro Manchado、David Díez、Francisca Sanz、Narciso M. Garrido
DOI:10.1016/j.tetasy.2017.10.005
日期:2017.10
The asymmetric synthesis of methyl (E)-4-(1R,2S,3R)-3-amino-2-((E)-2-methoxycarbonyl-eten-1-yl)cyclohexyl)but-2-enoate 14 has been achieved from dimethyl (2E,7E)-nona-2,7-dienedioate 2. A key step is the asymmetric synthesis of 1-hydroxyoctahydro-1H-isochromene derivative 5 whose X-ray analysis corroborated the stereochemistry of the new stereocenters. The asymmetric synthesis of the isochromenyl acetate derivative 11 shows the potential of this methodology for fused cyclohexanic system heterocyclic synthesis. (C) 2017 Elsevier Ltd. All rights reserved.