Strategies and tactics for free radical carbocyclization: synthesis of polyfunctionalized cyclopentanoid molecules from carbohydrates
摘要:
The tributyltin hydride + azobisisobutyronitrile (AIBN) mediated free radical carbocyclization of precursors 1-9, 48 and 49 is described. The resulting carbocycles have been obtained in moderate yield and good diastereoselectivity. These polyfunctionalized, enantiomerically pure cyclopentane derivatives are useful intermediates for further manipulation.
A new synthetic route to chiral, multiply functionalized cyclopentane rings
作者:José Marco Contelles、Pilar Ruiz、Belén Sánchez、M.L. Jimeno
DOI:10.1016/s0040-4039(00)79149-0
日期:1992.9
The tributyltin hydride mediated free radicalcyclization of sugar derivatives 4–6 gives the annulatedfuranoses 9–11 in good yield and high diastereoselectivity. This protocol is a new synthetic route for the preparation of complex cyclopentanoid molecules.