کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1388579 1500904 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Zeolite catalyzed selective deprotection of di- and tri-O-isopropylidene sugar acetals
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Zeolite catalyzed selective deprotection of di- and tri-O-isopropylidene sugar acetals
چکیده انگلیسی

H-Beta zeolite, a microporous solid acid, is demonstrated to be an efficient catalyst for the selective deprotection of cyclic as well as acyclic O-isopropylidene sugar acetals derived from d-glucose, d-xylose, d-mannose, and d-mannitol in aqueous MeOH at room temperature. A notable observation is the conversion of d-mannitol triacetonide into 1,2:3,4-di-O-isopropylidene-d-mannitol (48%) and 3,4-O-isopropylidene-d-mannitol (36%) brought about in 6 h by H-beta zeolite and the non-occurrence of any hydrolysis in the case of H-ZSM-5 catalyzed reaction in 24 h under the same conditions.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 343, Issues 10–11, 21 July 2008, Pages 1801–1807
نویسندگان
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