已经开发出一种高度对映和非对映选择性的多米诺硫杂-迈克尔/羟醛反应,该反应应用 5 H -二苯并[ a , c ][7]annulen-5-one 作为迈克尔受体,由手性磷酸 (CPA) 催化。桥联联芳基加合物在桥连键中包含多个立体中心以及热力学控制的立体中心。两种阻转非对映异构体之间的能量差约为9.1 kcal mol -1,这解释了观察到的优异的非对映选择性(>20:1)。
Efficient Synthesis of Dibenzo[<i>a</i>,<i>c</i>]cyclohepten-5-ones via a Sequential Suzuki−Miyaura Coupling and Aldol Condensation Reaction
作者:Young Lok Choi、Chan-Mo Yu、Bum Tae Kim、Jung-Nyoung Heo
DOI:10.1021/jo900508z
日期:2009.5.15
strategy for the synthesis of a 7-membered-ring system with a Suzuki−Miyaura coupling followed by an acid/base-promoted intramolecular aldol condensation reaction has been developed. The reaction of 2′-bromoacetophenones with 2-formylphenylboronic acids in the presence of Pd(OAc)2 and CataCXium PIntB L8 efficiently provided biaryl compounds, which were transformed to a wide array of dibenzo[a,c]cyclohepten-5-ones
CPA-catalyzed asymmetric domino thia-Michael/aldol reactions for simultaneous chiral center and axial chirality formation
作者:Xilong Wang、Yu Luo、Jiaji Zhao、Shuang Luo
DOI:10.1039/d3ob01087b
日期:——
A highly enantio- and diastereoselective domino thia-Michael/aldol reaction applying 5H-dibenzo[a,c][7]annulen-5-one as a Michael acceptor, catalyzed by a chiral phosphoric acid (CPA), has been developed. The bridged biaryl adduct contains multiple stereogenic centers in the bridging linkage as well as a thermodynamically controlled stereogenic axis. The energy difference between the two atropodiastereomers
已经开发出一种高度对映和非对映选择性的多米诺硫杂-迈克尔/羟醛反应,该反应应用 5 H -二苯并[ a , c ][7]annulen-5-one 作为迈克尔受体,由手性磷酸 (CPA) 催化。桥联联芳基加合物在桥连键中包含多个立体中心以及热力学控制的立体中心。两种阻转非对映异构体之间的能量差约为9.1 kcal mol -1,这解释了观察到的优异的非对映选择性(>20:1)。