Asymmetric Synthesis of 1,3-Butadienyl-2-carbinols by the Homoallenylboration of Aldehydes with a Chiral Phosphoric Acid Catalyst
作者:Yiyong Huang、Xing Yang、Zongchao Lv、Chen Cai、Cheng Kai、Yong Pei、Yu Feng
DOI:10.1002/anie.201501832
日期:2015.6.15
Asymmetric C(sp)C(sp2) bond formation to give enantiomerically enriched 1,3‐butadienyl‐2‐carbinols occurred through a homoallenylboration reaction between a 2,3‐dienylboronic ester and aldehydes under the catalysis of a chiral phosphoric acid (CPA). A diverse range of enantiomerically enriched butadiene‐substituted secondary alcohols with aryl, heterocyclic, and aliphatic substituents were synthesized
不对称 C(sp) C(sp 2) 在手性磷酸 (CPA) 的催化下,通过 2,3-二烯基硼酸酯和醛之间的均烯基硼化反应形成对映异构体富集的 1,3-丁二烯基-2-甲醇。以非常高的收率和高对映选择性合成了多种具有芳基、杂环和脂肪族取代基的富含对映异构体的丁二烯取代的仲醇。初步的密度泛函理论 (DFT) 计算表明,反应通过环状六元椅状过渡态进行,在丙二烯试剂中具有必要的氢键活化。该催化反应适用于手性烷基丁二烯基加合物的克级合成,