Facile Synthetic Route to (2<i>S</i>,3<i>S</i>)‐3‐Amino‐2‐hydroxy‐4‐phenylbutyric Acid and Its Derivatives, the Key Intermediates for HIV Protease Inhibitors
作者:Lijun Lei、Xuchang He、Donglu Bai
DOI:10.1081/scc-200058003
日期:2005.6
Abstract A facile and efficient route to (2S,3S)‐3‐amino‐2‐hydroxy‐4‐phenylbutyric acid and its derivative (4S,5S)‐4‐benzyl‐5‐hydroxymethyl oxazolidin‐2‐one is presented. N‐phthaloyl protected L‐phenylalanine 1 was treated with thionyl chloride followed by hydrogenation of the acyl chloride 2 on Pd/C, giving (S)‐2‐phthalimido‐3‐phenylpropionaldehyde 3. Aldehyde 3 reacted with Nagata's reagent to afford
摘要 提出了一种制备 (2S,3S)-3-氨基-2-羟基-4-苯基丁酸及其衍生物 (4S,5S)-4-苄基-5-羟甲基恶唑烷-2-one 的简便有效的路线。N-邻苯二甲酰保护的 L-苯丙氨酸 1 用亚硫酰氯处理,然后在 Pd/C 上氢化酰氯 2,得到 (S)-2-邻苯二甲酰亚胺-3-苯丙醛 3。醛 3 与 Nagata 试剂反应得到 3-邻苯二甲酰亚胺-2-羟基-4-苯基丁腈4作为非对映体混合物。经水解、保护、酯化和还原后,4以良好的收率转化为光学纯的化合物7。