A process and intermediates for the preparation of fungicidal 7-alkyl-triazolopyrimidines
申请人:BASF AKTIENGESELLSCHAFT
公开号:EP1359150A2
公开(公告)日:2003-11-05
A process and intermediates for the preparation of triazolopyrimidine compounds of formula I
wherein R1, X, L1, L2, L3, L4 and L5 are as defined in the description, which comprises reacting alkyl 2-aryl-3-alkyl-3-oxopropionates of formula IV
wherein R1 and L1, L2, L3, L4 and L5 are as defined for formula I and R' represents an optionally substituted alkyl group,
a) with 2-amino-[1,3,4]-triazole, and treating the resulting 5-hydroxytriazolopyrimidines of formula I, wherein X represents a hydroxy group, with a halogenating agent, and
b) optionally treating the resulting 5-hydroxytriazolopyrimidines with an alcohol or a thioalkohol in the presence of a base, or with a metal amide, a metal alkyl amide or a metal dialkylamide, or a metal cyanide.
一种制备式 I 的三唑并嘧啶化合物的工艺和中间体
其中 R1、X、L1、L2、L3、L4 和 L5 如说明中所定义,包括使式 IV 的 2-芳基-3-烷基-3-氧代丙酸烷基酯反应
其中 R1 和 L1、L2、L3、L4 和 L5 如式 I 所定义,R'代表任选取代的烷基、
a) 用 2-氨基-[1,3,4]-三唑,并用卤化剂处理所得到的式 I 的 5-羟基三唑嘧啶,其中 X 代表羟基,以及
b) 可选择在碱存在下用醇或硫代烷醇,或用金属酰胺、金属烷基酰胺或金属二烷基酰胺,或金属氰化物处理所得的 5-羟基三唑并嘧啶。