[(1R,4R)-1,7,7-Trimethyl-bicyclo[2.2.1]hept-(2Z)-ylideneamino]-acetic acid (1S,2R,5S)-2-isopropyl-5-methyl-cyclohexyl ester 、
2-溴丙烷 在
lithium diisopropyl amide 作用下,
生成
(S)-3-Methyl-2-[(1R,4R)-1,7,7-trimethyl-bicyclo[2.2.1]hept-(2Z)-ylideneamino]-butyric acid (1S,2R,5S)-2-isopropyl-5-methyl-cyclohexyl ester 、 (S)-3-Methyl-2-[(1R,4R)-1,7,7-trimethyl-bicyclo[2.2.1]hept-(2Z)-ylideneamino]-butyric acid (1S,2R,5S)-2-isopropyl-5-methyl-cyclohexyl ester