Indium-Mediated Allenylation of Aldehydes and Its Application in Carbohydrate Chemistry: Efficient Synthesis of D-Ribulose and 1-Deoxy-D-ribulose
作者:Michael Fischer、Christoph Schmölzer、Christina Nowikow、Walther Schmid
DOI:10.1002/ejoc.201001443
日期:2011.3
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
开发了一个两步反应序列,从铟介导的醛与 4-bromo-2-butyn-1-ols 的烯丙基化和随后生成的烯丙基产物的臭氧分解开始,以生成各种二羟基丙酮衍生物。铟促进的 C-C 键形成反应的区域选择性可以通过 4-bromo-2-butyn-1-ol 上的羟基保护基来控制,生成丙二烯或炔烃作为首选产物。与已建立的方案相比,这种类型的烯基化所需的铟量可以减少两到四倍。该策略的多功能性在 D-核酮糖和 1-脱氧-D-核酮糖的立体选择性和直接合成中得到证明。