Chemo- and biocatalytic strategies to obtain phenylisoserine, a lateral chain of Taxol by asymmetric reduction
作者:Isabella Rimoldi、Michela Pellizzoni、Giorgio Facchetti、Francesco Molinari、Daniele Zerla、Raffaella Gandolfi
DOI:10.1016/j.tetasy.2011.11.017
日期:2011.12
via asymmetric reduction with transition metal–diphoshine complexes or with whole cells of non-conventional yeasts. Asymmetric hydrogenation was carried out using different approaches: hydrogenation of the tetra-substituted double bond of (E)-1-benzamido-3-ethoxy-3-oxo-1-phenylprop-1-en-2-yl ethyl oxalate 1 with Ir(I)–diphosphine complexes in the presence of TEA, hydrogenation of the carbonyl group
通过过渡金属-二膦配合物或非常规酵母全细胞的不对称还原,获得了丰富的3-苯甲酰胺基-2-羟基-3-苯基丙酸乙酯(被保护的苯基异丝氨酸)(紫杉醇的手性侧链)。不对称氢化是使用不同的方法:(的四取代的双键的氢化ë)-1-苯甲酰氨基-3-乙氧基-3-氧代-1-苯基丙-1-烯-2-基草酸乙酯1与铱配(I)在TEA存在-diphosphine配合物,外消旋3-苯甲酰氨基-2-氧代-3-苯基丙的羰基的氢化2与钌(II)配合物-diphoshine在路易斯酸和最后一个的存在(E的两步酶促转化)-1-苯甲酰胺基-3-乙氧基-3-氧代-1-苯基丙-1-烯-2-基草酸乙酯1被带有细胞结合酯酶和脱氢酶的酵母全细胞催化。