A method for preparing A-type procyanidins is provided by reacting flavylium salts with catechins and analogs thereof, under anhydrous conditions in alcohol.
提供了一种制备A型原花青素的方法,通过在无水酒精中,在儿茶素及其类似物下,用黄烷酮盐反应。
US7615649B2
申请人:——
公开号:US7615649B2
公开(公告)日:2009-11-10
US8138358B2
申请人:——
公开号:US8138358B2
公开(公告)日:2012-03-20
US8415489B2
申请人:——
公开号:US8415489B2
公开(公告)日:2013-04-09
Thermodynamic Stability of Flavylium Salts as a Valuable Tool To Design the Synthesis of A-Type Proanthocyanidin Analogues
analogues from flavylium salts and π-nucleophiles has been developed. It was found that the thermodynamic stability of the starting flavylium salt, assessed by the measurement of the apparent acidity constant (K′a), was the key parameter to design effective one-pot reactions between flavylium salts and nucleophiles such as phloroglucinol and (+)-catechin. When flavylium salts have a pK′a value of 1.7