作者:Jack G. Parsons、Mark A. Rizzacasa
DOI:10.1016/0040-4039(94)88298-3
日期:1994.10
A synthesis of a protected C-1 side chain precursor (2) of the anti-cholesteremic agents the squalestatins and zaragozic acid A has been achieved in 9 steps from 1,4-butanediol. The key transformations involve a one pot oxidation/α-methylenation sequence to provide the α,β-unsaturated aldehyde 4 and subsequent asymmetric aldol reaction to introduce the C-4′ and C-5′ stereocentres.
由1,4-丁二醇以9个步骤合成了抗胆固醇药,角鲨抑制素和马来酸A的保护的C-1侧链前体(2)。关键的转化涉及一锅氧化/α-甲基化序列以提供α,β-不饱和醛4,以及随后的不对称醛醇缩合反应以引入C-4'和C-5'立体中心。