Preparation of triazoles by organometallic addition to ketones and intermediates therefor
申请人:Pfizer, Inc.
公开号:US06586594B1
公开(公告)日:2003-07-01
A process for the preparation of a compound of the formula:
or an acid addition or base salt thereof, wherein R is phenyl optionally substituted by 1 to 3 substituents each independently selected from halo and trifluoromethyl; R1 is C1-C6 alkyl; and “Het” is pyrimidinyl optionally substituted by 1 to 3 substituents each independently selected from C1-C4 alkyl, C1-C4 alkoxy, halo, oxo, benzyl and benzyloxy, comprising reacting a compound of the formula:
with a compound of the formula
wherein X is chloro, bromo or iodo, the reaction taking place in the presence of zinc; at least one of iodine or a Lewis acid; and an aprotic organic solvent: optionally further reacting the resulting compound with an acid or base to form the corresponding acid addition or base salt thereof.
该方法用于制备以下化合物:或其酸加合物或碱盐,其中R是苯基,可以选择地被1至3个取代基取代,每个取代基独立地选自卤素和三氟甲基;R1是C1-C6烷基;“Het”是嘧啶基,可以选择地被1至3个取代基取代,每个取代基独立地选自C1-C4烷基、C1-C4烷氧基、卤素、氧代基、苄基和苄氧基,包括将以下化合物与以下化合物反应:其中X是氯、溴或碘,在锌的存在下进行反应;至少使用碘或路易斯酸;和无水有机溶剂:可选择进一步将所得化合物与酸或碱反应,形成相应的酸加合物或碱盐。