SYNTHESIS OF 3-ALKYL-3-PHOSPHORYL CHROMANONES: TANDEM ALLYL-VINYL MIGRATION AND CYCLIZATION OF α-(O-HYDROXYBENZOYL)-ALLYLIC PHOSPHONATES

Won Bum Jang Department of Chemistry, Korea Advanced Institute of Science and Technology, Yusong Gu, Taejon, 305-701, Korea

Chi-Wan Lee Department of Chemistry, Korea Advanced Institute of Science and Technology, Yusong Gu, Taejon, 305-701, Korea

Kilsung Lee Department of Chemistry, Korea Advanced Institute of Science and Technology, Yusong Gu, Taejon, 305-701, Korea

Jin Wuk Sung Department of Chemistry, Korea Advanced Institute of Science and Technology, Yusong Gu, Taejon, 305-701, Korea

Dong Young Oh Department of Chemistry, Korea Advanced Institute of Science and Technology, Yusong Gu, Taejon, 305-701, Korea

Abstract

2-Alkyl-3-phosphoryl chromanones and its thio-derivatives were synthesized by a tandem allyl-vinyl migration and cyclization of α-(o-hydroxybenzoyl)-allylic phosphonates which were readily produced from lithiated allylic phosphonates and salicylate.

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SYNTHESIS OF 3-ALKYL-3-PHOSPHORYL CHROMANONES: TANDEM ALLYL-VINYL MIGRATION AND CYCLIZATION OF α-(O-HYDROXYBENZOYL)-ALLYLIC PHOSPHONATES

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SYNTHESIS OF 3-ALKYL-3-PHOSPHORYL CHROMANONES: TANDEM ALLYL-VINYL MIGRATION AND CYCLIZATION OF α-(O-HYDROXYBENZOYL)-ALLYLIC PHOSPHONATES

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