Chirality and conformational changes in 4-phenylphenanthrenes and 1-phenylbenzo[c]phenanthrene derivatives
作者:W.H. Laarhoven、W.H.M. Peters、A.H.A. Tinnemans
DOI:10.1016/0040-4020(78)88117-4
日期:1978.1
NMR data of several 4-phenylphenanthrenes (15, 16) have revealed that the crowding in these compounds does not lead to chirality at temperatures as low as −90°. The easy rotation of the phenyl substituent observed by NMR implies that notwithstanding the phenanthrene moiety in average behaves as a planar part the phenyl group does not experience steric hindrance.
的几个4- phenylphenanthrenes(NMR数据15,16)已经揭示,这些化合物中的拥挤的温度下不导致手性低至-90°。通过NMR观察到的苯基取代基的容易旋转意味着尽管平均菲部分表现为平面部分,但是苯基没有空间位阻。