The invention discloses a preparation such as type IX shown double hydroxyl protection of simvastatin intermediate, synthesis of intermediates or simvastatin as shown by X single hydroxyl protection, which comprises the following steps: under the protection of inert gas, in an inert organic solvent, the catalytic effect of water insoluble metal cyanide next, the compound of formula VII or VIII is shown, and type III as shown in the 2, 2 - two methyl butyryl chloride reaction can be respectively prepared simvastatin intermediate double hydroxyl protection like type I X shown, or shown as the X hydroxyl protection of simvastatin intermediate; R: 1 for the double protection of hydroxyl group, R: 2 C: 1 C: 8 alkyl, R: 3 single hydroxyl protecting group. The method of the invention can greatly reduce the raw material compound 2, 2 - two methyl butyryl chloride (III) dosage, reduce the generation of by-products, without the use of acid binding, and has the advantages of simple operation, mild condition, high yield, high purity, and has high industrial application value.
【技术实现步骤摘要】
本专利技术涉及一种辛伐他汀中间体的新合成方法。
技术介绍
Taoka等(Taoka N, Inoue K, A process for producing a simvastatin precursory], EP 1533308, 2005. p.13.)用吡啶作溶剂和缚酸剂,在4-二甲氨 基吡啶(DMAP)的催化下,用三醇酸縮酮甲酯(II )和其4倍摩尔量的2,2-二甲基丁酰氯(III)酰化制备辛伐他汀中间体(I ),产物纯度低,必需经 柱层析分离纯化。式n 式i而后,叶红平等(叶红平,孙萌,朱作霖.辛伐他汀的制备方法, wo2006034641, 2006. p.27.)对上述方法作了改进,改用二氯甲垸作溶剂,吡啶 作缚酸剂,经LiBr催化,化合物II和2,2-二甲基丁酰氯(III)反应,制备辛 伐他汀中间体(I )。但LiBr需要复杂特殊的干燥程序,且在投料过程中容 易吸湿,若加入湿的LiBr反应副产物较多,操作繁琐。Dabora等(Dabora RL, Tewalt GL. Process to simvastatin ester. US 51591 ...
【技术保护点】
一种制备如式Ⅸ所示的双羟基保护的辛伐他汀中间体,或如式Ⅹ所示的单羟基保护的辛伐他汀中间体的合成方法,其特征在于包括如下步骤:惰性气体保护下,在惰性有机溶剂中,在水难溶性金属氰化物的催化作用下,将如式Ⅶ或Ⅷ所示的化合物,与如式Ⅲ所示的2,2-二甲基丁酰氯反应,即可分别制得如式Ⅸ所示的双羟基保护的辛伐他汀中间体,或如式Ⅹ所示的单羟基保护的辛伐他汀中间体; *** 其中,R↓[1]为双羟基保护基; R↓[2]为C↓[1]-C↓[8]的烷基; R↓[3]为单羟 基保护基。
【技术特征摘要】
【专利技术属性】
技术研发人员:卞红平,周后元,应瑞芬,
申请(专利权)人:上海医药工业研究院,
类型:发明
国别省市:31[中国|上海]
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