Synthetic studies on (–)-FR182877: construction of the ABCD ring system via the intramolecular cycloadditions (1)
作者:Takahiro Suzuki、Natsumi Tanaka、Takehiko Matsumura、Yosuke Hosoya、Masahisa Nakada
DOI:10.1016/j.tetlet.2007.07.051
日期:2007.9
Construction of the ABCD ring system of (–)-FR182877 via the highly diastereoselective intramolecular Diels–Alder (IMDA) reaction is described. The IMDA reaction of the α,β-unsaturated aldehyde generated in situ from the corresponding acetal successfully provided the desired product 14 possessing the AB ring system as the single diastereomer. The CD ring system was constructed by the subsequent IMHDA
描述了通过高度非对映选择性分子内Diels-Alder(IMDA)反应构建(-)-FR182877 ABCD环系统的过程。由相应的乙缩醛就地产生的α,β-不饱和醛的IMDA反应成功地提供了具有AB环系统的所需产物14作为单一非对映异构体。CD环系统是由随后的IMHDA反应构建的,另外的实验表明,IMHDA反应的非对映选择性与烯烃17的E / Z几何形状有关,该烯烃是由16位原位生成的。