Journal of Organic Chemistry p. 4140 - 4146 (2018)
Update date:2022-08-29
Topics:
Dao, Pham Duy Quang
Ho, Son Long
Lim, Ho-Jin
Cho, Chan Sik
Aryl 2-bromobenzoates and aryl 2-bromocyclohex-1-enecarboxylates are cyclized by microwave irradiation in dimethylformamide in the presence of K2CO3 to give the corresponding 6H-benzo[c]chromen-6-ones and their 7,8,9,10-tetrahydro analogues, respectively, in 50-72% yields. Aryl 3-bromoacrylates are also converted into 2H-chromen-2-ones under the employed conditions.
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