1,1-Disubstituted-2,3,4,9-tetrahydro-1<i>H</i>-pyrido[3,4-<i>b</i>]indolecarboxylic acid esters and ketones. The base catalyzed transformation of 1-(2′,3′,4′,9′-tetrahydrospiro[cyclohexane-1,1′-[1<i>H</i>]pyrido[3,4-<i>b</i>]indol]-2-yl)alkanones into 2-(4,9-dihydro-3<i>H</i>-pyrido[3,4-<i>b</i>]indol-1-yl)-1 -alkylcyclohexanols
作者:George Bobowski、John Shavel
DOI:10.1002/jhet.5570220643
日期:1985.11
with cyclic β-keto esters 2 under azeotropic conditions followed by acid-catalyzed ring closure of the resulting enamines 3 gave 2′,3′,4′,9′-tetrahydrospiro[piperidine-3,1′,-[1H]pyrido[3,4-b]indole] -4-carboxylic acid alkyl esters 4. Condensation of 1 with 2-acylcycloalkanones 8 gave two types of enamines, 10 and 11, respectively. Enamines 10 on treatment with acid gave 1-(2′,3′,4′,9′-tetrahydro-3H-pyrido[3
在共沸条件下将1H-吲哚-3-乙胺1与环状β-酮酯2缩合,然后酸催化的所得烯胺3闭环,得到2',3',4',9'-四氢螺[哌啶-3 ,1',-[[1H]吡啶基[3,4-b]吲哚] -4-羧酸烷基酯4。1与2-酰基环烷酮8的缩合反应分别生成两种烯胺,分别为10和11。用酸处理的烯胺10得到1-(2′,3′,4′,9′-四氢-3H-吡啶并[3,4-b]吲哚-1-基)-1-烷基环己醇17。化合物17进一步脱水得到环烷烃衍生物19。