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    • 2. 发明申请
    • PROCESSES TO PRODUCE CERTAIN 2-(PYRIDINE-3-YL)THIAZOLES
    • 生产某些2-(吡啶-3-基)噻唑的方法
    • WO2013184476A3
    • 2014-01-30
    • PCT/US2013043208
    • 2013-05-30
    • DOW AGROSCIENCES LLC
    • ROSS RONALDDEAMICIS CARLZHU YUANMINGNIYAZ NOORMOHAMED MWEST SCOTT PROTH GARYARNDT KIM E
    • C07D417/04
    • C07D417/04C07D213/83
    • The invention disclosed in this document is related to the field of processes to produce certain 2-(pyridine-3-yl)thiazoles as intermediates for the synthesis of pesticidal thiazole amides. In step a, compounds (I) and (II) are reacted to produce compound (III). The reaction is conducted in a polar protic solvent. Examples of such solvents include, but are not limited to, formic acid, n-butanol, isopropanol, n-propanol, ethanol, methanol, acetic acid, and water. In step b, compound (III) is cyclized using a dehydrating agent. Examples of such dehydrating agents include, but are not limited to, POCI3, H2S04, SOCI2, P205, polyphosphoric acid, p-toluene sulfonic acid, and trifluoroacetic anhydride. One advantage of steps a and b over the art is that compound (III) and (IV) are generally produced as substantially pure solids that do not need additional purification procedures.
    • 本文公开的发明涉及产生某些2-(吡啶-3-基)噻唑作为合成杀虫噻唑酰胺的中间体的方法领域。 在步骤a中,化合物(I)和(II)反应生成化合物(III)。 反应在极性质子溶剂中进行。 这些溶剂的实例包括但不限于甲酸,正丁醇,异丙醇,正丙醇,乙醇,甲醇,乙酸和水。 在步骤b中,使用脱水剂使化合物(III)环化。 这种脱水剂的实例包括但不限于POCI 3,H 2 SO 4,SOCl 2,P 2 O 5,多磷酸,对甲苯磺酸和三氟乙酸酐。 步骤a和b在本领域中的一个优点是,化合物(III)和(IV)通常被生产为基本上纯的固体,其不需要额外的纯化程序。