Oxidation Reactions of 2′-Functionalized 3-Aryltetrahydro and 3,4-Dihydroisoquinolines
作者:Nuria Sotomayor、Esther Domínguez、Esther Lete
DOI:10.1016/0040-4020(95)00827-u
日期:1995.11
Several 2'-functionalized 3-arylisoquinolines in different oxidation stages have been prepared. Fremy's salt or I-2/NaAcO oxidation of 2'-functionalized 3-aryltetrahydroisoquinolines always stops at the 3,4-dihydroisquinoline stage; however, better yields and shorter reaction Limes are obtained with iodine. Air/KOH/DMSO oxidation of 3,4-dihydroisoquinolines furnished the aromatic derivatives with concomitant cleavage of the TBDPS group. While 3-arylisoquinolin-1-(2H)-ones are obtained by air oxidation of 3,4-dihydroisquinolinium salts, the use of DDQ in dioxane resulted in a selective dehydrogenation to the corresponding N-substituted isoquinolinium salts.