87264-55-9Relevant academic research and scientific papers
Pyrolysis and Photolysis of the N-Oxides of Protopines and Hexahydrobenzophenanthridines. Syntheses of the Secoberbines and Benzophenanthridines
Iwasa, Kinuko,Sugiura, Makiko,Takao, Narao
, p. 998 - 1008 (2007/10/02)
Pyrolysis and photolysis of the N-oxides of the protopines 9 and 16 produces the ring-enlarged compounds 10 and 17, whose reduction with zinc in acetic acid leads to the secoberbines (+/-)-corydalisol (11) and (+/-)-hypecorine (12) from 9, and the corresponding analogs (18 and 19) from 16.Pyrolysis of (+)-chelidonine N-oxide (24) generates dihydrosanguinarine (22).Keywords - pyrolysis; photolysis; N-oxide; protopine; sanguinarine; corydalisol; hypecorine
THE PYROLYSIS AND PHOTOLYSIS OF THE PROTOPINE TYPE ALKALOID N-OXIDES. THE SYNTHESIS OF THE SECOBERBINES AND BENZOPHENANTHRIDINES
Iwasa, Kinuko,Takao, Narao
, p. 1535 - 1539 (2007/10/02)
The pyrolysis of the N-oxides of the protopine-type alkaloids afforded three products, one of which was converted to the naturally occurring secoberbines.The photolysis of the N-oxides of the protopines supplied the benzophenanthridines as well as the one of the pyrolysis products.
