Origin of the Stereoselectivity in (Ethoxycarbonyl)-, Cyano-, and Phenyl-Substituted (Arylsulfinyl)methyl Radicals
作者:Philippe Renaud、Thierry Bourquard、Pierre-Alain Carrupt、Mich�le Gerster
DOI:10.1002/hlca.19980810518
日期:——
carbonyl-substituted (arylsulfinyl)methyl radicals is presented, based on experimental results and semiempirical calculations. The influence of dipole-dipole interactions, allylic 1,3-strain (A1,3 strain), allylic 1,2-strain (A1,2 strain), and coulombic interactions is discussed based on stereoselectivities observed with (alkoxycarbonyl)-, cyano-, and aryl-substituted (arylsulfinyl)methyl radicals. In the second part
基于实验结果和半经验计算,给出了对羰基取代的(芳基亚磺酰基)甲基自由基观察到的非常高的非对映选择性的解释。基于对(烷氧基羰基)-的立体选择性,讨论了偶极-偶极相互作用,烯丙基1,3-菌株(A 1,3菌株),烯丙基1,2-菌株(A 1,2菌株)和库仑相互作用的影响。 ,氰基和芳基取代的(芳基亚磺酰基)甲基基团。在第二部分中,已经研究了溶剂和路易斯酸对(芳基亚磺酰基)-和(烷基亚磺酰基)苄基的反应的立体选择性的影响。