New synthesis of alditol thiaheterocycles via ring closure of vicinal bis-cyclic thionocarbonates of alditols
作者:Sami Halila、Mohammed Benazza、Gilles Demailly
DOI:10.1016/s0040-4039(01)02282-1
日期:2002.1
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.
Regioselective synthesis of alditol vicinal bis-cyclic thionocarbonates via alditol stannylene acetal complexes as a short and efficient route to α,ω-diiodoalditol derivatives
作者:Sami Halila、Mohammed Benazza、Gilles Demailly
DOI:10.1016/s0008-6215(01)00287-7
日期:2002.1
The bis-cyclic thionocarbonates of alditols (pentitols and hexitols) were quickly and easily obtained from alditol stannylene complexes and phenyl chlorothionoformate (PhOC(S)Cl) in good yields. Acetylation of isolated free alditol bis-thionocarbonates and subsequent iodination using methyl iodide under pressure led to alpha,omega-diiodo derivatives of alditols in good to excellent isolated yields