Stereoselectivity in the condensation reactions of 1-phenylethyl alkyl and phenyl ketones with organometallic reagents
作者:Carlos Alvarez-Ibarra、Odón Arjona、Rafael Pérez-Ossorio、Alfredo Pérez-Rubalcaba、María L. Quiroga、María J. Santesmases
DOI:10.1039/p29830001645
日期:——
Stereochemical results of the condensation reactions of a series of ketones, PhCHMeCOR (R = Me, Et, Pri, But, Ph), with various organomagnesium and organolithium derivatives in ethers as solvents are reported. Results are accounted for on the basis of competition between two transition states which may adopt either Karabatsos- or Felkin-type conformations according to the nature of R, the reagent nucleophilicity
一系列酮,PhCHMeCOR(R =甲基,乙基,Pr中的缩合反应的立体化学结果我,卜吨作为报道溶剂在醚中,Ph),与各种有机镁和有机锂衍生物。根据两个过渡态之间的竞争来说明结果,根据R的性质,试剂亲核性和溶剂的极性,可以采用Karabatsos型或Felkin型构象。该反应的极性和空间分析允许设计非对映异构体α-苯基链烷醇的高度立体选择性的合成。