Radical cyclization–fragmentation of ω-haloalkyl cyclobutanones: a modular approach to medium-sized carbocycles
作者:Heong-Sub Oh、Jin Kun Cha
DOI:10.1016/j.tetasy.2003.07.011
日期:2003.10
Kulinkovich cyclopropanation of cycloalkene carboxylates and subsequent electrophilic addition to haloalkyl acetals, provides a convenient method for appending seven- and eight-membered rings onto cycloalkene carboxylates. An enantioselective preparation of a medium-sized carbocycle is possible by the use of a non-racemic, C2-symmetric acetal.
ω-卤代烷基连接的螺环环丁酮的简便的自由基环化-断裂序列,可通过环烯羧酸的Kulinkovich环丙烷化反应以及随后的亲电子加成到卤代烷基缩醛中而容易地获得,这为将七元和八元环附加到环烯烃羧酸酯上提供了一种便捷的方法。 。通过使用非外消旋的C 2对称乙缩醛,可以对中型碳环化合物进行对映选择性制备。