Journal
TETRAHEDRON LETTERS
Volume 50, Issue 23, Pages 2744-2746Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2009.03.114
Keywords
Polyol; Stannylene acetal; Catalysis; Benzylation
Categories
Funding
- CNPq
- CAPES
- UFRJ
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A direct selective protection (O-benzylation) of two or more hydroxyl groups in polyols displaying diverse Structural patterns was made possible by the establishment of conditions that enable an efficient turnover for the Bu2Sn group, initially at the corresponding stannylene acetals (only similar to 1.0 mol equiv of Bu2SnO was employed). It was also demonstrated that one might exert control over the number of protected groups, by means of appropriate tuning of reaction conditions. The feasibility of a substoichiometric (tin source) catalytic protocol was demonstrated as well. (C) 2009 Elsevier Ltd. All rights reserved.
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