Two monoacetylated fragments 1 and 2 corresponding to the C-1—C-10 portion of nystatin A1 have been prepared by controlled degradation. The 3R, 5R and 7R relative configurations at the asymmetric centers of these fragments were determined by 2D-proton phase-sensitive DQF-COSY nmr and nOe difference spectroscopy.
Synthesis of the C1C10 fragment of the macrolide antibiotic Nystatin A1 from a chiral building block obtained via chemoenzymatic approach
作者:C. Bonini、A. Giugliano、R. Racioppi、G. Righi
DOI:10.1016/0040-4039(96)00300-0
日期:1996.4
a novel synthesis of C1C10 fragment of Nystatin A1 was accomplished: the synthetic sequence utilized, as chiralbuildingblock, a protected syn 1,3 polyol previously obtained by chemoenzymatic route. The final fully protected fragment was then transformed to a known lactone in order to demonstrate the correct relative and absolute configuration.
完成了制霉菌素A 1的C 1 = C 10片段的新颖合成:该合成序列作为手性构件使用了以前通过化学酶促途径获得的受保护的syn 1,3多元醇。然后将最终的完全保护的片段转化为已知的内酯,以证明正确的相对和绝对构型。