Tetrahedron p. 2013 - 2024 (1999)
Update date:2022-08-29
Topics:
D'Auria, Maurizio
Ferri, Tommaso
Mauriello, Giacomo
Pesce, Antonella
Racioppi, Rocco
The photochemical reaction of some halogenoheterocycles substituted with electron withdrawing groups with acrylonitrile gave the addition product in high yields. The irradiation of 2-acetyl-5-phenylthiophene at 355 nm with a Nd:YAG laser in the presence of phenylacetylene gave 1-phenylnaphthalene, probably formed the triplet state of phenylacetylene. 2-Acetyl-5- phenylthiophene is a sensitizer for this reaction. The irradiation of 2- nitro-5-phenylthiophene and 2-nitro-2',5-bithienyl in the presence of arylalkynes gave products from an oxidation reaction of the alkynes. The sensitization of phenylacetylene triplet can be explained assuming the population of a higher triplet state.
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