Synthesis of 1-alkyl-2,3-dihydro-2-(4-pyridinyl)-1<i>H</i>-isoindoles as potential selective serotonin reuptake inhibitors
作者:Kevin J. Kapples、Gregory M. Shutske
DOI:10.1002/jhet.5570340440
日期:1997.7
1-alkylhydroxyisoindolones 6a-f which, in two cases 6a,b, were dehydrated and subjected to three separate reductions to give targets 2c,d. In three cases, the intermediate hydroxyisoindolones 6c-e were reduced in one step to the target compounds 2c-g with lithium aluminum hydride-aluminum chloride. When 6f, the product of the addition of phenyl Grignard to 5, was subjected to these conditions, a hydroxyisoindoline
通过异吲哚啉与4-氯吡啶的反应合成了两个2,3-二氢-2-(4-吡啶基)-1 H-异吲哚2a,b。另外,从2-(4-吡啶基)邻苯二甲酰亚胺(5)获得许多1-烷基-2,3-二氢-2-(4-吡啶基)-1H-异吲哚2c-h。将烷基格氏试剂添加到5中,得到1-烷基羟基异吲哚并酮6a-f,在两种情况下将其脱水6a,b并进行三个单独的还原,得到目标2c,d。在三种情况下,中间体羟基异吲哚酮6c-e一步还原为目标化合物2c-g用氢化铝锂-氯化铝。当将6g(将苯基格氏试剂添加至5)的产物置于这些条件下时,获得羟基异吲哚啉7,将其进一步用三乙基硅烷-三氟乙酸还原至2h。氢化铝锂-氯化铝条件成功地用于合成1-苄基-4-哌啶衍生物21