Absolute asymmetric synthesis. III. Hindered rotation about aryl-ethylene bonds in the excited states of diaryl ethylenes. Structural effects on the asymmetric synthesis of 2- and 4-substituted hexahelicenes
作者:William J. Bernstein、Melvin. Calvin、Ole. Buchardt
DOI:10.1021/ja00783a036
日期:1973.1
Conformational studies on hexahelicenes—II
作者:W.H. Laarhoven、R.G.M. Veldhuis
DOI:10.1016/0040-4020(72)88060-8
日期:1972.1
The synthesis of eight alkyl substituted hexahelicene derivatives by photodehydrocyclization is described.