Chemical and Pharmaceutical Bulletin p. 956 - 966 (1996)
Update date:2022-08-03
Topics:
Saitoh
Oyama
Sakurai
Niimura
Hinata
Horiguchi
Toda
Sano
The thermal addition reaction of various aroylketenes (C) generated by the thermolysis of 5-aryldioxofurans (A) to 1-aryl-1-trimethylsilyloxyethylenes gave 1,5-diarylpentane-1,3,5-triones (D) and 2,6-diaryl-4H-pyran-4-ones (E). The introduction of electron withdrawing substituents in the aroylketene and of electron donating substituents facilitated the addition reaction. The observed substituent effects and the reaction mechanism are interpreted in terms of molecular orbital analyses.
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(1998)
