Synthesis of the Potassium Channel Opener (3<i>S</i>,4<i>R</i>)‐3,4‐Dihydro‐4‐(2,3‐dihydro‐2‐methyl‐3‐oxo‐pyridazin‐6‐Yl)oxy‐3‐hydroxy‐6‐(3‐hydroxyphenyl)sulphonyl‐2,2,3‐trimethyl‐2H‐benzo[b]pyran
作者:Javier Magano、Allison Acciacca、Vladimir Beylin、Julie Spence、Peter Dunn、Mike Hughes
DOI:10.1080/00397910701557531
日期:2007.10.1
roxyphenyl)sulphonyl‐2,2,3‐trimethyl‐2H‐benzo[b]pyran (1) as a single enantiomer is reported. Considerable improvements have been implemented with respect to the original synthesis that allow for the preparation of multigram quantities of the final target compound. The optimized synthesis consists of a six‐step linear sequence whose key step is an asymmetric epoxidation protocol through the use of
摘要 钾通道开放剂 (3S,4R)-3,4-dihydro-4-(2,3-dihydro-2-methyl-3-oxo-pyridazin-6-yl)oxy-3-hydroxy-6 的制备报道了-(3-羟基苯基)磺酰基-2,2,3-三甲基-2H-苯并[b]吡喃(1)作为单一对映异构体。相对于原始合成进行了相当大的改进,允许制备数克数量的最终目标化合物。优化的合成由六步线性序列组成,其关键步骤是通过使用 Jacobsen's (S,S)-(+)-N,N'-bis(3,5-di-tert-butylsalicylidene) 的不对称环氧化方案)-1,2-环己烷二氨基锰(III)氯化物催化剂。