Toward the total synthesis of phorboxazole A: synthesis of an advanced C4–C32 subunit using the Jacobsen hetero Diels–Alder reaction
作者:Ian Paterson、Chris A. Luckhurst
DOI:10.1016/s0040-4039(03)00754-8
日期:2003.5
The tetrahydropyranone 3, representing a pentacyclic C4–C32 segment of the phorboxazoles, was obtained by a complex hetero Diels–Alder (HDA) coupling performed between the 2-siloxydiene 23 and the oxazole aldehyde 4, mediated by the chiral tridentate Cr(III) catalyst 14. In preliminary studies, the tetrahydropyrans 17, 33 and 35 were accessed using this same asymmetric HDA methodology with varying
的四氢吡喃酮3,代表五环ç 4 -C 32段所述的phorboxazoles,用复杂的杂狄尔斯-阿尔德(HDA)2- siloxydiene之间进行耦合而获得23和恶唑醛4,通过手性三齿的Cr(介导的III)催化剂14。在初步研究中,四氢吡喃17,33和35使用具有不同的立体选择性此相同的非对称HDA方法被访问。