The enantioselective hydrolysis of (±)-4-(1-acetoxyethyl)-N-(cyclohexylcarbamoyl)-benzenesulfonamides 3 with lipase Amano P from Pseudomonas sp. in a water-saturated solvent gave (R)-4-(1-hydroxyethyl)-N-(cyclohyxylcarbamoyl)benzenesulfonamide 2 (39%, >99% ee) and unchanged (S)-3 (50%, 62% ee). On the other hand, enantioselective esterification of (±)-2 with lipase Amino P in the presence of vinyl acetate provided (R)-3 (41%, >99% ee) and unchanged (S)-2 (46%, 78% ee).
在
水饱和溶剂中,利用来自假单胞菌的阿玛诺P
脂肪酶对(±)-4-(1-乙酰氧基乙基)-N-(环己基
氨基)-苯磺酰胺3进行对映选择性
水解,得到(R)-4-(1-羟乙基)-N-(环己基
氨基)苯磺酰胺2(39%,大于99%的对映体过剩率)和未改变的(S)-3(50%,62%的对映体过剩率)。另一方面,在
乙烯乙酸酯存在下,利用阿米诺P
脂肪酶对(±)-2进行对映选择性酯化,得到(R)-3(41%,大于99%的对映体过剩率)和未改变的(S)-2(46%,78%的对映体过剩率)。