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Synthesis of Trifluoromethylated 4H-1-Benzopyran Derivatives via Photocatalytic Trifluoromethylation/Oxidation/Conjugate Addition, and Cyclization Sequences of Vinyl Phenols
- Jang, Jihoon;
- Kim, Dae Young
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9초록
The objective of this study was to describe a cyclization reaction of photoredox generated ortho-quinone methides using 1,3-diketones for the synthesis of trifluoromethylated 4H-1-benzopyrans with moderate to high yields. This process resulted in in situ formation of trifluoromethylated ortho-quinone methides from 2-vinyl phenols with Umemoto's reagent, followed by conjugate addition and cyclization reaction of 1,3-diketones.
키워드
ortho-Quinone methides; 4H-benzopyrans; photoredox reaction; multicomponent reaction; ORTHO-QUINONE METHIDES; FRIEDEL-CRAFTS ALKYLATION; BETA-KETO ACIDS; ASYMMETRIC-SYNTHESIS; DECARBOXYLATIVE ALKYLATION; ENANTIOSELECTIVE SYNTHESIS; 4+2 ANNULATION; FLUORINE; TETRAHYDROQUINOLINES; CYCLOPENTANONES
- 제목
- Synthesis of Trifluoromethylated 4H-1-Benzopyran Derivatives via Photocatalytic Trifluoromethylation/Oxidation/Conjugate Addition, and Cyclization Sequences of Vinyl Phenols
- 저자
- Jang, Jihoon; Kim, Dae Young
- 발행일
- 2022-04
- 유형
- Article
- 권
- 11
- 호
- 4
- 페이지
- 1 ~ 4