摘要:
본 발명은 할로겐이 치환된 벤조산으로부터 할로겐이 치환된 벤질 알코올의 제조방법에 관한 것이다. 본 발명의 방법을 이용하여 할로겐이 치환된 벤질 알코올을 제조하는 경우, 수소화붕소나트륨과 저가의 무기산을 사용하므로, 특수 반응기를 사용하지 않고도 벤질 알코올을 제조하는 것이 가능하여, 제조공정이 편리하고, 산업 폐기물이 감소되며, 고수율 및 고순도의 벤질 알코올을 제조할 수 있어, 제초제 및 간전제 합성의 원료로서 유용한 벤질 알코올의 대량생산에 용이하다.
摘要:
The present invention relates to salts of Memantine and COX-INHIBITORs, their crystal form, the processes for preparation of the same and their uses as medicaments, more particularly for the treatment of pain.
摘要:
The object of the invention is the preparation of 2-chloro-4-fluoro-5-nitrobenzoic acid and derivatives thereof, by nitration of 2-chloro-4-fuorobenzotrichloride and the conversion of the novel synthetic intermediate thus obtained into its acid form or derivatives thereof; a further object of the invention is the conversion of benzotrichloride synthetic intermediates into the corresponding benzotrifluoride derivatives.
摘要:
Perfluoroisopropylbenzene derivatives of the general formula (I) or salts thereof, useful as intermediates or raw materials in the synthesis of various industrial materials including agricultural chemicals, drugs and surfactants, wherein X1 is H, halogeno, formyl, optionally halogenated C1-6 alkyl, C1-6 alkylthio, or the like; X2 is H, halogeno, formyl, hydroxyl, C1-6 alkyl, -C(=O)-R1 (wherein R1 is H, halogeno, hydroxyl, C1-6 alkyl, or NR2R3, with R2 and R3 being each H, C1-6 alkyl, or the like), or the like; X3 is H, halogeno, hydroxyl, cyano, isocyanato, hydrazino, diazo, -C(=O)-R1, -SO2-R4 (wherein R4 is halogeno, hydroxyl, C1-6 alkyl, or NR5R6, with R5 and R6 being each H or C1-6 alkyl), or the like; and X4 is H, halogeno, C1-6 alkyl, or C1-6 alkoxy, with publicly known compounds being excepted.
摘要:
A process for the monodecarboxylation of a halogenated aromatic dicarboxylic acid or derivative thereof in which the halogenated aromatic dicarboxylic acid or derivative thereof in a liquid medium is heated characterised in that the liquid medium is a polar aprotic liquid medium.
摘要:
The present invention comprises coumponds of formulas (I), (II), (III), wherein X is Cl or Br. These compounds are useful as intermediaries for the production of 2,4,5-trifluorobenzoic acid and 2,4,5-trifluorobenzoyl fluoride.