Journal of Heterocyclic Chemistry p. 1977 - 1982 (1996)
Update date:2022-08-04
Topics:
Kafka, Stanislav
Kovar, Michal
Klasek, Antonin
Kappe, Thomas
The Wittig reaction of 3-hydroxy-1,2,3,4-tetrahydroquinoline-2,4-diones 2 with ethyl (triphenyl-phosphoranylidene)acetate 3 proceeds stereoselectively to give E-4-carbethoxymethylene-1,2,3,4-tetrahydro-2-quinolones 4, which were hydrolyzed to corresponding acids 6. Butenolides 5 were detected and, in some cases, isolated as a minor product of the Wittig reaction.
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