Reduction methodologies for converting ketal acids, salts, and esters to ketal alcohols
申请人:Topping Robert J.
公开号:US20080161563A1
公开(公告)日:2008-07-03
The present invention relates to methods of reducing ketal acids, salts and esters to form corresponding ketal alcohols. More particularly, the reducing methods convert the ketal acids, salts, or esters to ketal alcohols by using a reducing agent that comprises a hydride that comprises one or more alkoxy moieties. The ketal alcohol is prepared in a hydrophobic reagent. This is purified by washing the hydrophobic reagent with one or more water washes. Because the ketal alcohol has some water solubility, the water washes are back-extracted with a hydrophobic solvent to recover additional ketal alcohol from such one or more water washes. The alcohol products are useful in many applications such as intermediates in the synthesis of pharmacologically important molecules.
本发明涉及将酮酸、盐和酯还原为相应的酮醇的方法。更具体地说,还原方法通过使用包含一个或多个烷氧基的氢化物的还原剂将酮酸、盐或酯转化为酮醇。酮醇是在疏水试剂中制备的。通过用一个或多个水洗涤疏水试剂来纯化。由于酮醇具有一定的水溶性,所以水洗涤用疏水溶剂进行反萃取,以从一个或多个水洗涤中回收额外的酮醇。这些醇类产品在许多应用中很有用,例如在合成药理学重要分子的中间体中。