Department of Chemistry, University of Stanford, Stanford, CA 94035-5080, USA.
Angew Chem Int Ed Engl. 2012 Jul 2;51(27):6704-8. doi: 10.1002/anie.201203035. Epub 2012 Jun 5.
[Image: see text] By controlling the kinetics of alkynylation over aldolisation (by slowing adding the acceptor), the challenging asymmetric catalytic alkynylation of acetaldehyde has been realized. This protocol yields the corresponding attractive synthons in good to excellent enantiocontrol and shows broad tolerance and applicability. This was highlighted by its application to the synthesis of several natural products such as the rapid construction of the macrocyclic diolide (+)-tetrahydropyrenophorol.
[图像:见正文] 通过控制炔丙基化相对于羟醛缩合的动力学(通过缓慢添加受体),实现了具有挑战性的乙醛不对称催化炔丙基化。该方案以良好到优异的对映选择性得到相应的吸引人的合成子,并表现出广泛的耐受性和适用性。该方法的应用突出体现在几种天然产物的合成中,例如大环二醇(+)-四氢罂粟醇的快速构建。