Process for preparing a dipeptidyl peptidase IV inhibitor and intermediates employed therein
申请人:Sharma N. Padam
公开号:US20050222242A1
公开(公告)日:2005-10-06
A process is provided for preparing a dipeptidyl peptidase IV inhibitor of the structure
wherein
is treated with TFAA in isopropyl acetate to protect the tertiary hydroxyl group as a trifluoroacetate group to form 4
(which is a novel intermediate)
which is converted to acid chloride compound 5
(which is a novel compound)
using Vilsmeier reagent or other chloro reagent and coupled with compound 6 in a heterogeneous mixture of ethyl acetate and aqueous bicarbonate to give compound 7
The N,O-bis(trifluoroacetyl) groups of compound 7 are deprotected to give free base compound 10.
提供了一种制备二肽基肽酶IV抑制剂的方法,其中化合物1在异丙酸酯中用三氟乙酸酐处理,以将三级羟基保护为三氟乙酸酯基,形成化合物4(一种新的中间体),然后使用威尔斯迈尔试剂或其他氯试剂将其转化为酸氯化合物5(一种新的化合物),并与化合物6在乙酸乙酯和碳酸氢钠的混合物中偶联,形成化合物7。化合物7的N,O-双(三氟乙酰基)基团被脱保护,得到自由碱基化合物10。