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A study of sensitized photooxygenation of 3,4‐dihydro‐2 H ‐pyran
Author(s) -
Yi Cao,
JianXin Chen,
BaoWen Zhang,
YangFu Ming
Publication year - 1986
Publication title -
acta chimica sinica english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 0256-7660
DOI - 10.1002/cjoc.19860040102
Subject(s) - photooxygenation , chemistry , pyran , medicinal chemistry , organic chemistry , singlet oxygen , oxygen
The photooxygenation of 3,4‐dihydro‐2 H ‐pyran sensitized by cyanoanthracenes (9,10‐dicyanoanthracene and 9‐cyanoanthracene) in different solvents (CH 3 CN, CH 3 Cl 2, C 6 H 6 and CCl 4 ) has been studied in this paper. The products, product distribution as well as solvent isotope effect are the same as those in the reaction of singlet oxygen. Fluorescence quenching, exciplex formation and free energy change also reveal that electron transfer occurs between sensitizer‐excited singlet state and substrate and then singlet oxygen is formed subsequently as the reactive intermediate in the process.