问题：求助专利2篇
类型：求助 (悬赏分:3分)
提问：copfeng
等级：▲
版块：文献代查(hipbird,playdoom,claymore,)
信誉：100%
回复：2
阅读：363
时间：2009-03-13 15:52:57 编辑加入/取消收藏订制/取消短消息举报该贴

请求高人代查专利2篇，JP57024348（1982）和Czech 267458（1990），最好是英文的，万分感谢!

回复人：hzl82612,★ (相信我，没错的！) 时间：2009-03-13 16:32:24 编辑

1楼

Abstract of JP 57024348 (A)

PURPOSE:To obtain the titled compound useful as an intermediate for dye inexpensively, in high yield, and with suppressing the formation of diurea compounds as by-products, by reacting an acid salt of a diamine with a cyanate in an aqueous solution of an inorganic salt. CONSTITUTION:An acid salt of a diamine (e.g., m-phenylenediamine, 4-methyl- 1,3-diaminobenzene, etc.) shown by the formula I (X is H, Cl, methyl, or methoxy) is reacted with a cyanate (e.g., sodium salt, potassium salt, etc.) in an aqueos medium dissolving an inorganic salt (e.g., sodium salt, potassium salt, etc. of hydrochloric acid, sulfuric acid, nitric acid, etc.) at 5-40 deg.C, preferably 15-25 deg.C in pH2-4, to give the desired compound shown by the formula II (A and B are H or -CONH2, being different each other).

回复人：claymore,★★★★★ (C-H活化，kumada,suzuki,stille,negishi.cross-coupling.) 时间：2009-03-13 17:52:53 编辑	2楼
已经打分了！

得分人：hzl82612 :1,

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