Thermolysis of benzannulated enyne-carbodiimides. Application in the synthesis of pyrido [1', 2': 1, 2] pyrimido [4, 5-b] indoles and related heteroaromatic compounds
... Volume: Page: ... 5-Methyl-12-phenyl-5H-pyrido[1',2':1,2]pyrimido[4,5-b]indol-11-ium Iodide (12a). To a solution of 0.0195 g (0.066 mmol) of 4a in 15 mL of chloroform was added 13.2 mL of a 0.05 M solution of methyl iodide (0.660 mmol) in chloroform. ...