The compound 4 then reacted with sodium methoxide,methanol and 4,6-dichloropyrimidine in tetrahydrofuran to produce methyl(E)-2-[2-(6-chloropyrimidi.

首先以鄰羥基苯乙酸(2)為原料與原甲酸三甲酯在醋酐中反應(yīng)制備3-(α-甲氧基)-亞甲基苯并呋喃-2(3氫)-酮(4),收率59%;化合物4再與甲醇鈉、4,6-二氯嘧啶在四氫呋喃中反應(yīng)得到(E)-2-[2-(6-氯嘧啶-4-基氧基)苯基]-3-甲氧基丙烯酸甲酯(6),收率60%;化合物6與水楊腈反應(yīng)得到嘧菌酯(1),收率81%。

4,6-Dihydroxypyrimidine was prepared from formamide and dimethyl malonate and then converted to 4,6-dichloropyrimidine (purity 98.

以甲酰胺、丙二酸二甲酯為原料合成4,6-二羥基嘧啶,然后采用三氯氧磷氯化法合成4,6-二氯嘧啶。

Guanidine nitrate and diethyl malonate were used as main materials to prepare 2-amino-4,6-dicarboxyl pyrimidine by cyclization,followed by chloridization to prepare 2-amino-4,6-dichloropyrimidine,and then by methoxidization to prepare 2-amino-4,6-dimethoxy pyrimidine.

以硝酸胍和丙二酸二乙酯為原料,經(jīng)過環(huán)合生成2-氨基-4,6-二羥基嘧啶,氯化生成2-氨基-4,6-二氯嘧啶,再經(jīng)甲氧基化得最終產(chǎn)品2-氨基-4,6-二甲氧基嘧啶。