Development of Scalable Synthesis of 5-Butyl-4-(4-methoxyphenyl)-6-phenylpyrimidin-2-amine (WQE-134), a Dual Inhibitor of Nitric Oxide and Prostaglandin E2 Production,Organic Process Research & Development

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Development of Scalable Synthesis of 5-Butyl-4-(4-methoxyphenyl)-6-phenylpyrimidin-2-amine (WQE-134), a Dual Inhibitor of Nitric Oxide and Prostaglandin E2 Production
Organic Process Research & Development ( IF 3.1 ) Pub Date : 2020-08-28 , DOI: 10.1021/acs.oprd.0c00324
Pavel Dosoudil ₁ , Vladislav Kotek ₁ , Viktor Kolman ₂ , Ondřej Baszczyňski ₂ , Martin Maxmilian Kaiser ₂ , Zlatko Janeba ₂ , Miroslav Havránek ₁

Affiliation

We report a scalable efficient synthesis of 5-butyl-4-(4-methoxyphenyl)-6-phenylpyrimidin-2-amine (WQE-134), a dual inhibitor of nitric oxide and prostaglandin E₂ production with potent anti-inflammatory properties. The original five-step synthesis (40% overall yield) was based on two Suzuki–Miyaura reactions and required chromatographic purification of both the intermediate and final products. The novel synthetic pathway is based on cyclization of 2-butyl-1-(4-methoxyphenyl)-3-phenylpropane-1,3-dione with guanidinium methanesulfonate using Eaton’s reagent (P₂O₅/MsOH) at 50 °C. The two-step synthesis (34% overall yield) can be performed on a multigram to kilogram scale, and purification of the final product consists of simple extraction (dichloromethane) and crystallization (ethyl acetate and methanol).

中文翻译：

一氧化氮和前列腺素E ₂生产的双重抑制剂5-丁基-4-（4-甲氧基苯基）-6-苯基嘧啶-2-胺（WQE-134）的可扩展合成方法的开发

我们报告了5-丁基-4-（4-甲氧基苯基）-6-苯基嘧啶-2-胺（WQE-134）的可扩展有效合成方法，这是一氧化氮和前列腺素E ₂生产的双重抑制剂，具有强大的抗炎特性。最初的五步合成（总收率40％）基于两个Suzuki-Miyaura反应，并且需要对中间产物和最终产物进行色谱纯化。新颖的合成途径是基于使用伊顿试剂（P ₂ O ₅）将2-丁基-1-（4-甲氧基苯基）-3-苯基丙烷-1,3-二酮与甲磺酸胍环化/ MsOH）在50°C下。两步合成法（总收率34％）可以在几克到千克的范围内进行，最终产物的纯化包括简单的萃取（二氯甲烷）和结晶（乙酸乙酯和甲醇）。

更新日期：2020-09-20

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