Stereopentads Derived from a Sequence of Mukaiyama Aldolization and Free Radical Reduction on α-Methyl-β-alkoxy Aldehydes: A General Strategy for Efficient Polypropionate Synthesis
作者:Jean-François Brazeau、Philippe Mochirian、Michel Prévost、Yvan Guindon
DOI:10.1021/jo8021583
日期:2009.1.2
aldolization with enoxysilane 24 followed by a hydrogen transfer reaction. Recent advancements concerning these reactions are described, and novel key intermediates are characterized in the aldol step. The synthesis of C(1)−C(11) fragment 60 of zincophorin, which contains a synthetically challenging stereopentad unit, is described attesting the usefulness of our strategy.
在一个stereodivergent方式,所有非对映体16个stereopentads 7 - 22合成起始α甲基β -烷氧基醛25和27。我们设计了一种方法,该方法基于先用乙氧基硅烷24进行Mukaiyama醛缩醛缩合反应,然后进行氢转移反应。描述了有关这些反应的最新进展,并在醇醛步骤中表征了新的关键中间体。描述了锌卟啉的C(1)-C(11)片段60的合成,其中包含一个具有挑战性的立体五单元,证明了我们策略的有效性。