Synthesis of Potentially β-Blocking Practolol Derivatives: (E +Z)-3-[4-(3-Iodoprop-2-enyloxycarbonylamino)phenoxy]-1-(isopropylamino)propan-2-ol
作者:Marcel Apparu、Younes Ben Tiba、Pierre-Marc Léo、Daniel Fagret
DOI:10.1002/(sici)1099-0690(200003)2000:6<1007::aid-ejoc1007>3.0.co;2-i
日期:2000.3
route chosen, from 4-aminophenol and the chloroformate β7, had to be abandoned because of the formation of the oxazolidinone 10 during the epoxidation step. The aminoalcohol 17 prepared from the practolol 1 finally gave the target compounds by condensation with the iodoallylic chloroformates 8 (E + Z). The secondary Boc-protected amine function was regenerated without removing the carbamate function
合成了具有潜在 β 阻断特性的碘化氨基甲酸酯 3 (E + Z)。由于在环氧化步骤中形成恶唑烷酮 10,必须放弃从 4-氨基苯酚和氯甲酸酯 β7 中选择的第一条路线。由普拉考洛尔 1 制备的氨基醇 17 最终通过与碘代烯丙基氯甲酸酯 8 (E + Z) 缩合得到目标化合物。通过使用温和的反应条件 (1 N HCl),在不去除位于 p 位的氨基甲酸酯官能团的情况下再生了仲 Boc 保护的胺官能团。