Synthesis of Angularly Substituted Trans-Fused Hydroindanes by Convergent Coupling of Acyclic Precursors
作者:Valer Jeso、Claudio Aquino、Xiayun Cheng、Haruki Mizoguchi、Mika Nakashige、Glenn C. Micalizio
DOI:10.1021/ja504374j
日期:2014.6.11
TMS-alkyne) followed by regioselective alkoxide-directed coupling with the enyne, stereoselective intramolecular cycloaddition, elimination of phenoxide, 1,3-metallotropic shift, and stereoselective protonation of the penultimate allylic organometallic intermediate. Several examples are given to demonstrate the compatibility of this reaction with substrates bearing aromatic and aliphatic substituents
现在可以通过三甲基甲硅烷基 (TMS)-炔烃与 4-羟基-1,6-烯炔通过形成三个 C-C 键、一个 C-H 键和两个新的立体中心。建议通过初始形成 Ti-炔烃配合物(带有 TMS-炔烃)进行环化,然后与烯炔进行区域选择性醇盐定向偶联、立体选择性分子内环加成、苯氧化物消除、1,3-金属向位移和立体选择性倒数第二个烯丙基有机金属中间体的质子化。给出了几个例子来证明该反应与带有芳香族和脂肪族取代基的底物的相容性,并提出了一个经验模型来伴随立体化学观察。