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Paper | Regular issue | Vol 26, No. 7, 1987, pp.1841-1852
Published online, 1st January, 1970
DOI: 10.3987/R-1987-07-1841
A Novel Rearragement of a Papaverine Derivative into Isoquino[1,2-b]quinozoline Derivative

Yusuf Ahmad, Tahira Begum, Izhar Hussain Qureshi, Atta-ur-Rahman, Khurshid Zaman, Xu Changfu, and Jon Clardy

*Pharmaceutical and Fine Chemicals Division, P.C.S.I.R. Laboratories, karachi-39, Pakistan


Anthranilopapaverine (2) was rearranged by pyrolysis or photolysis into a new heterocycle (3). The structure of (3) has been elucidated by X-ray crystallography and by Spectroscopic methods. Pyrolysis of (2) also gives an isomeric mesoionic szaberbinone (5).