Convenient preparation of optically active cibenzoline and analogues from 3,3-diaryl-2-propen-1-ols
作者:Naka Koyata、Tsuyoshi Miura、Yoko Akaiwa、Hisashi Sasaki、Rie Sato、Takuya Nagai、Hirohisa Fujimori、Takuya Noguchi、Masayuki Kirihara、Nobuyuki Imai
DOI:10.1016/j.tetasy.2009.08.024
日期:2009.9
ee) was prepared by cyclopropanation of 3,3-diphenyl-2-propen-1-ol 1 with Et2Zn and CH2I2 in the presence of a catalytic amount of (S)-2-(methanesulfonyl)amino-1-(p-toluenesulfonyl)amino-3-phenylpropane 2, followed by esterification with 3,5-dinitorobenzoyl chloride, recrystallization, and hydrolysis.
由(+)-2,2-二苯基环丙基甲醇3a(98%ee)分两步合成(R)-(+)-噻吩啉(95%ee ),将其在DMSO中用IBX氧化,然后在乙二胺中用乙二胺处理。存在的我2和K 2 CO 3在吨BuOH中。化合物(R)-(+)- 3a(98%ee)通过在催化量存在下,将3,3-二苯基-2-丙烯-1-醇1与Et 2 Zn和CH 2 I 2环丙烷化制备的(小号)-2-(甲磺酰基)氨基-1-(p甲苯磺酰)氨基-3-苯基丙烷2,然后用3,5-二硝基苯甲酰氯进行酯化,重结晶和水解。