Novel Protocol for the Asymmetric Synthesis of 3-Hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one via Bakers’ Yeast Reduction
作者:Sadao Tsuboi、Takuzo Komiyama、Yutaka Takaguchi
DOI:10.3987/com-05-s(k)57
日期:——
A novel protocol for the asymmetric synthesis of 3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one is reported. Darzens condensation reactions of anisaldehyde with dichloroacetates, followed substitution reaction of sodium o-nitrophenylthiolate and bakers' yeast reduction furnished 2-hydroxy-3-(4-methoxyphenyl)-3-(2-nitrophenylsulfanyl)-propionates. Further reduction of a nitro
报道了一种不对称合成 3-hydroxy-2-(4-methoxyphenyl)-2,3-dihydro-1,5-benzothiazepin-4(5H)-one 的新方案。茴香醛与二氯乙酸酯的 Darzens 缩合反应,随后邻硝基苯硫醇钠的取代反应和面包酵母还原提供 2-羟基-3-(4-甲氧基苯基)-3-(2-硝基苯硫基)-丙酸酯。进一步还原硝基并环化得到标题化合物。