发明名称 |
N-Cyanoimidates, their preparation and rearrangement to pyrimidines. |
摘要 |
Propenimidates are provided having the formula: <CHEM> Wherein X and Y are independently O or S; and R<1> and R<2> are independently C1-C4 alkyl, (CH2)nOR<3> where R<3> is C1-C4 alkyl and n is 1 or 2, CH2CH2Cl, or CH2CF3, provided that when R<1> or R<2> is CH2CH2Cl or CH2CF3, then the respective X or Y is O. Preferred propenimidates have X and Y as O and R<1> and R<2> as methyl or ethyl. The propenimidates are made either by preparing a monohydrohalide salt from a dihydrohalide salt of the formula: <CHEM> and then contacting the monohydrohalide salt with cyanamide or by contacting the dihydrohalide salt with two equivalents of a base to produce a bisimidate; contacting the bisimidate with cyanogen chloride to produce a mixture of N-cyanoimidate and a monohydrohalide bisimidate salt; and isolating the N-cyanoimidate. The propenimidates upon heating ring close to pyrimidines which are useful in preparing herbicidal compounds.
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申请公布号 |
EP0024200(A1) |
申请公布日期 |
1981.02.25 |
申请号 |
EP19800302794 |
申请日期 |
1980.08.13 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
FUCHS, JULIUS JAKOB;WAT, EDWARD KOON WAH |
分类号 |
C07C255/61;C07D239/46;C07D239/52;C07D239/54;C07D239/56;C07D239/58;(IPC1-7):C07C119/18;C07C121/16;C07C125/08;C07C149/24 |
主分类号 |
C07C255/61 |
代理机构 |
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代理人 |
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地址 |
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