Static and Dynamic Stereochemistry of<i>O</i>-Substituted<i>N</i>-9-Triptycylhydroxylamines
作者:Gaku Yamamoto、Chiharu Agawa、Mao Minoura
DOI:10.1246/bcsj.76.825
日期:2003.4
The static and dynamicstereochemistry of N-9-triptycylhydroxylamine derivatives (TpNHOR) with O-benzyl (3), O-ethyl (4), and O-phenyl (5) groups were studied. X-ray crystallographic analysis revealed that these compounds reside in a chiral conformation, with the Tp–N–O–R dihedral angle of 140–160°. Dynamic NMR studies of 3 and 4 show the presence of two separate stereomutation processes: chirality
Structure and Stereodynamics of<i>N</i>-9-Triptycyl-<i>O</i>-phenylhydroxylamine, an Unusual Product by the Reaction of 9-Nitrosotriptycene and Phenyllithium
作者:Gaku Yamamoto、Kyoko Kuwahara、Katsuya Inoue
DOI:10.1246/cl.1995.351
日期:1995.5
Reaction of 9-nitrosotriptycene with phenyllithium gave N-9-triptycyl-O-phenylhydroxylamine (TpNHOPh). The free energy barrier to rotation about the Tp-N bond is 10.9 kcal mol−1 and that to the N-O topomerization is higher than this.
9-亚硝基三萜与苯基锂反应得到N-9-三苯甲基-O-苯基羟胺(TpNHOPh)。围绕 Tp-N 键旋转的自由能垒为 10.9 kcal mol-1,而 NO 拓扑的自由能垒高于此值。
Kaur, Harparkash; Perkins, M. John; Scheffer, Andre, Canadian Journal of Chemistry, 1982, vol. 60, p. 1594 - 1596
作者:Kaur, Harparkash、Perkins, M. John、Scheffer, Andre、Vennor-Morris, David C.
DOI:——
日期:——
Klamann,D. et al., Justus Liebigs Annalen der Chemie, 1965, vol. 686, p. 122 - 133