New synthesis of alditol thiaheterocycles via ring closure of vicinal bis-cyclic thionocarbonates of alditols
摘要:
A new thiaheterocyclisation of alditols involving bis-cyclic thionocarbonate derivatives as bielectrophilic intermediates is reported. The polyhydroxylated tetrahydrothiophene, tetrahydropyrane and thiepane rings from erythritol, D,L-threitol, D-arabinitol, D-mannitol and galactitol were efficiently obtained. (C) 2002 Elsevier Science Ltd. All rights reserved.