期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2011, 期 9, 页码 1645-1651出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201001443
关键词
Indium; Allenes; Carbohydrates; Acyl anion; Water chemistry
A two-step reaction sequence starting with the indium-mediated allenylation of aldehydes with 4-bromo-2-butyn-1-ols and subsequent ozonolysis of the resulting allenylic product was developed to generate a variety of dihydroxyacetone derivatives. The regioselectivity of the indium-promoted C-C bond-forming reaction can be manipulated through hydroxy protecting groups on 4-bromo-2-butyn-1-ol, yielding either allenes or alkynes as preferred products. Compared to established protocols, the necessary amount of indium for this type of allenylation can be decreased by a factor of two to four. The versatility of this strategy was demonstrated in the stereoselective and straightforward synthesis of D-ribulose and 1-deoxy-D-ribulose.
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