中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1H-异吲哚-1,3(2H)-二酮,2-[(1S)-1-(羟甲基)-2-丙烯基]- | (-)-2-[(1S)-(hydroxymethyl)prop-2-enyl]-1H-isoindole-1,3-(2H)-dione | 174810-05-0 | C12H11NO3 | 217.224 |
N-乙氧羰基邻苯二甲酰亚胺 | N-ethoxycarbonylphthalimide | 22509-74-6 | C11H9NO4 | 219.197 |
邻苯二甲酸亚胺 | phthalimide | 85-41-6 | C8H5NO2 | 147.133 |
Insoluble cross-linked copolymers of styrene and 1% divinylbenzene with covalently bonded (S)-2-aminoalkoxy groups were used in the enantioselective α-methylation of cyclohexanone through the corresponding imines. Enantiomeric excesses of 94% of (S)-2-methylcyclohexanone were observed on methylation at 20 °C. An analogous optically active 2-aminoalkyl benzyl ether, under otherwise identical conditions, resulted in a lower enantiomeric excess (49%) with selectivity approaching that of the polymer only at −78 °C.