作者:Adrie A.M. Houwen-Claassen、A.J.H. Klunder、B. Zwanenburg
DOI:10.1016/s0040-4020(01)82039-1
日期:1990.1
Acid-catalysed solvolyses of cyclopentadienone epoxides lead to epoxide ring opening and take place regioselectively at C-4. The stereochemical outcome of the epoxide ring opening depends on the substitution pattern and the nature of the substituents. Trans opening is preferred in most cases. Participation of the substituents in the transition state, however, leads to cis opened products. Selective
环戊二烯酮环氧化物的酸催化溶剂分解导致环氧化物开环,并在C-4区域选择性地发生。环氧化物开环的立体化学结果取决于取代模式和取代基的性质。在大多数情况下,最好使用反式开口。然而,取代基以过渡态的参与导致顺式打开的产物。描述了与烯酮部分的选择性反应,即甲醇加成和碱性环氧化。