An efficient synthesis of bioactive chiralflavanones (1) was achieved through the Rh-catalyzed asymmetric1,4-addition of arylboronicacid to chromone. The reaction in toluene proceeded smoothly at room temperature in the presence of 0.5% Rh catalyst with electron-poor chiral diphosphine MeO-F12-BIPHEP. In this reaction, the 1,2-addition to (S)-1 frequently occurred to yield (2S,4R)-2,4-diaryl-4-chromanol
Chromone compounds, pharmaceutical compositions containing the same, and
申请人:Kureha Chemical Industry Co., Ltd.
公开号:US05698575A1
公开(公告)日:1997-12-16
A chromone derivative of the formula (I): ##STR1## wherein R.sup.11 is a pyrazolyl, pyrrolyl, triazolyl, benzotriazolyl, benzimidazolyl, indazolyl, or indolyl group, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 is independently a hydrogen or halogen atom, or a hydroxy or alkoxy group, or an alkoxy group substituted with one or more alkoxy groups, and X is an oxygen or sulfur atom, or a salt thereof is disclosed. The chromone derivative inhibits the activity of matrix metalloproteinase.