Reaction of indolizine-1,2-dicarboxylic anhydride with (3-bromo-4-pyridyl)triisopropoxytitanium gave 2-(3-bromoisonicotinoyl)-3-ethoxycarbonyl-indolizine-1-carboxylic acid as the sole product. The indolizine-l-carboxylic acid could be converted to 5,12-dimethylindolizine[2,1-g] isoquinoline in six steps.
Reaction of indolizine-1,2-dicarboxylic anhydride with (3-bromo-4-pyridyl)triisopropoxytitanium gave 2-(3-bromoisonicotinoyl)-3-ethoxycarbonyl-indolizine-1-carboxylic acid as the sole product. The indolizine-l-carboxylic acid could be converted to 5,12-dimethylindolizine[2,1-g] isoquinoline in six steps.
Reaction of 3-Ethoxycarbonylindoli-zine-1,2-dicarboxylic Anhydride with (3-Bromo-4-pyridyl)triisopropoxy- titanium: Synthesis of 5,12-Dimethyl- indolizino[2,1-g]isoquinoline (Ellip - ticine Analogue)
Reaction of indolizine-1,2-dicarboxylic anhydride with (3-bromo-4-pyridyl)triisopropoxytitanium gave 2-(3-bromoisonicotinoyl)-3-ethoxycarbonyl-indolizine-1-carboxylic acid as the sole product. The indolizine-l-carboxylic acid could be converted to 5,12-dimethylindolizine[2,1-g] isoquinoline in six steps.