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Spectroscopic evidence for the intermediacy of a 6‐ R ‐2,4‐diazabicyclo‐[3.1.0]hex‐2‐(3)ene in the photoisomerization of 4‐ R ‐1,4‐(3,4)‐dihydropyrimidines
Author(s) -
Van Der Stoel R. E.,
Van Der Plas H. C.,
Geurtsen G.
Publication year - 1980
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570170756
Subject(s) - chemistry , photoisomerization , photodissociation , ene reaction , nuclear magnetic resonance spectroscopy , spectroscopy , medicinal chemistry , stereochemistry , photochemistry , isomerization , organic chemistry , catalysis , physics , quantum mechanics
1 H‐ and 13 C‐nmr spectroscopy is presented showing that photolysis of 4‐( p ‐trifluoromethylphenyl)‐1,4‐(3,4)‐dihydropyrimidine yields 6‐( p ‐trifluoromethylphenyl)‐2,4‐diazabicyclo[3.1.0]hex‐2‐(3)ene.