Tishchenko reactions of aldehydes promoted by diisobutylaluminum hydride and its application to the macrocyclic lactone formation
作者:Yung-Son Hon、Ying-Chieh Wong、Chun-Ping Chang、Cheng-Han Hsieh
DOI:10.1016/j.tet.2007.08.074
日期:2007.11
Aliphatic aldehydes react with catalytic amount of Dibal-H in n-pentane to give the corresponding Tishchenko products in good to excellent yields. On contrary, α-silyloxy aldehydes give α-silyloxy ketones via Oppenauer oxidation under similar condition. Tishchenko reaction of ω-alkene aldehydes followed by RCM and hydrogenation affords a convenient method to prepare the 11–37 membered macrocyclic lactones
脂肪醛与正戊烷中催化量的Dibal-H反应,以良好至极好的收率得到相应的季申科产品。相反,在类似条件下,α-甲硅烷氧基醛通过Oppenauer氧化生成α-甲硅烷氧基酮。ω-烯烃醛的Tishchenko反应,然后进行RCM和氢化提供了一种方便的方法来制备11-37元大环内酯。