کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1390000 | 982952 | 2016 | 4 صفحه PDF | دانلود رایگان |
The preparation of 3,5-(E)-dieno-3,5,6,8-tetradeoxy-(S)-1,2-O-trichloroethylidene-α-d-glycero-octo-1,4-furano-7-ulose starting from either 1,2-O-(S)-trichloroethylidene-α-d-glucofuranose (β-chloralose) or 1,2-O-(S)-trichloroethylidene-α-d-galactofuranose (galactochloralose) and the preparation of methyl 3,5-(E)-dieno-3,5,6-trideoxy-(S)-1,2-O-trichloroethylidene-α-d-glycero-hepta-1,4-furano-uronate starting from β-chloralose are described. Endocyclic double bond formations were realised by the elimination of 3-acetoxy groups using DMF–sodium bicarbonate. This elimination was not successful when the starting compound was 1,2-O-(R)-trichloroethylidene-α-d-glucofuranose (α-chloralose), where the trichloromethyl group occupies the endo position.
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Journal: Carbohydrate Research - Volume 338, Issue 19, 10 September 2003, Pages 2013–2016