Total Syntheses of (±)-Cyclophellitol and (1<i>R</i>*,6<i>S</i>*)-Cyclophellitol
作者:José Luis Aceña、Odón Arjona、Joaquín Plumet
DOI:10.1021/jo962276o
日期:1997.5.1
A stereodivergent synthesis of (+/-)-cyclophellitol (1) and its unnatural diastereoisomer (1R,6S)-cyclophellitol (2), starting from the Diels-Alder adduct of furan and acrylic acid, is reported. The stereochemistry of the key step, the epoxidation of alkene 7, is controlled by the nature of the hydroxyl protecting groups.
A new route to synthesize cyclophellitol and epi-cyclophellitol from racemic starting materials in enantiopure forms has been developed The synthesis involves a multi-enzymatic biotransformation pathway of the novel cyano-cyclitol (1R 4S 5R 6R)/(1S 4R 5S 6S)-4 5 6-trihydroxycyclohex-2-enecarbonitrile by a cooperative use of lipase nitrile hydratase and amidase (C) 2010 Elsevier Ltd All rights reserved