作者:H. Kapeller、W.G. Jary、W. Hayden、H. Griengl
DOI:10.1016/s0957-4166(96)00507-1
日期:1997.1
(2S,3S,4S)-3-(4-Acetoxyphenyl)-2-amino-3-methylbutan-4-olide (S,S,S)-11, a precursor for the aminoacid part of Nikkomycin B, was prepared in a five step synthesis in 12% yield, involving two enzymatic steps. First enantiopurity was achieved by resolution of racemic ester 3 using protease from Aspergillus oryzae and second in lactone (RS,S,S)-10 the N-acetyl group was removed distereo- and chemoselectively to give the final aminolactone (S,S,S)-11 by application of acylase from Aspergillus sp. (C) 1997 Elsevier Science Ltd.
(2S,3S,4S)-3-(4-乙酰氧基苯基)-2-氨基-3-甲基丁-4-酯内酰( (S,S,S)-11,作为 Nikkomycin B 氨基酸部分的前体,是在五个步骤的合成中以 12% 的收率制备的,其中包括两个酶促步骤。首先,通过使用来自 Aspergillus oryzae 的蛋白酶分辨率分解外消旋酯 3,首次实现了对映体纯度;其次,在内酯 (RS,S,S)-10 中,N-乙酰基通过酶选择性和化学选择性地去除,得到最终的氨基内酯 (S,S,S)-11,应用了来自 Aspergillus sp. 的酰酶 (C) 1997 Elsevier Science Ltd.。