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Photochemical Reactions of 1‐Aryl‐2(1 H )‐pyrimidinones in Alcohol
Author(s) -
Nishio Takehiko
Publication year - 1992
Publication title -
liebigs annalen der chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 0170-2041
DOI - 10.1002/jlac.199219920114
Subject(s) - pyrimidinones , chemistry , alcohol , isocyanate , medicinal chemistry , ethanol , aryl , bond cleavage , organic chemistry , photochemistry , alkyl , catalysis , polyurethane
Irradiation of the 2(1 H )‐pyrimidinones 1 in alcohols such as 2‐propanol and ethanol afforded the 1‐(alkoxycarbonylamino)‐3‐(arylimino)‐1‐propenes 4a – c , h and 2‐(alkoxycarbonylamino)‐4‐(arylimino)‐2‐pentenes 4d – g . These photoproducts are formed by trapping the isocyanate intermediates 2 , generated initially by the Norrish‐type I cleavage of the ArN—CO bond of the 2(1 H )‐pyrimidinones, with the alcohol.