Planar tether control groups and π-facial selectivity: Intramolecular cycloadditions for polycyclic systems
作者:D.Scott Millan、Tham T. Pham、Jodi A. Lavers、Alex G. Fallis
DOI:10.1016/s0040-4039(96)02459-8
日期:1997.2
The direct synthesis of the fused ring systems 11 (R = Me, H) and the decalin 14 are described. The use of a planar tether control group (either aromatic ring or double bond) greatly facilitates the key Diels-Alder cycloadditions. A second intermolecular cycloaddition of 14 with cyclopentadiene afforded the tetracyclic adduct 17. The interaction between the allylic ethers and diene substituents influences
描述了稠环系统11(R = Me,H)和十氢化萘14的直接合成。平面系链控制基团(芳环或双键)的使用极大地促进了关键的Diels-Alder环加成反应。14与环戊二烯的第二分子间环加成得到四环加合物17。烯丙基醚和二烯取代基之间的相互作用影响在这些实施例中观察到的面部选择性。