Process for the preparation of phenylglyoxylic acid esters
    1.
    发明授权
    Process for the preparation of phenylglyoxylic acid esters 失效
    苯乙醛酸酯的制备方法

    公开(公告)号:US4596885A

    公开(公告)日:1986-06-24

    申请号:US875707

    申请日:1978-02-06

    CPC分类号: C07D253/06 C07D253/07

    摘要: A process for the preparation of a phenylglyocylic acid ester of the formula ##STR1## wherein R.sup.1 represents alkyl,X represents halogen, alkyl, halogenoalkyl, alkoxy or nitro, andn represents 0, 1, 2, or 3by contacting a benzoyl cyanide of the formula ##STR2## wherein X and n have the meanings stated above, in a sulphuric acid/water system in the presence of chloride ions at a temperature between 0.degree. and 70.degree. C. to form phenylglyoxylic acid amide and reacting the phenylglyoxylic acid amide without isolation with an alcohol of the formula R.sup.1 -OH, wherein R.sup.1 has the meaning stated above, optionally in the presence of a diluent, at a temperature between 40.degree. and 100.degree. C.

    摘要翻译: 制备式(Ⅶ)的苯基乙二酸酯的方法,其中R 1表示烷基,X表示卤素,烷基,卤代烷基,烷氧基或硝基,n表示0,1,2或3, 在硫酸/水体系中,在氯离子存在下,在0〜70℃的温度下,式(ⅩⅧ)的苯甲酰氰(其中X和n具有上述含义),形成苯基乙醛酸酰胺 并且使苯基乙醛酸酰胺与分子式为R 1 -OH的醇反应,其中R 1具有上述含义,任选在稀释剂存在下,在40℃至100℃的温度下反应。

    4-Amino-1,2,4-triazin-5-ones
    3.
    发明授权
    4-Amino-1,2,4-triazin-5-ones 失效
    4-氨基-1,2,4-三嗪-5-酮

    公开(公告)号:US4057546A

    公开(公告)日:1977-11-08

    申请号:US625277

    申请日:1975-10-23

    IPC分类号: C07D253/06

    CPC分类号: C07C251/72 C07C251/88

    摘要: Novel glyoxylic acid hydrazide-2-acylhydrazones of the formula: ##STR1## in which R.sup.1 is hydrogen or alkyl, andR.sup.2 is alkyl or optionally substituted phenylAnd are prepared by reacting the corresponding glyoxylic acid ester 2-acylhydrazone with hydrazine hydrate. The compounds (I) are useful in preparing herbicidally active 4-amino-1,2,4-triazine-5-one compounds.

    摘要翻译: 具有下式的新型乙醛酰肼-2-酰腙:其中R 1是氢或烷基,R 2是烷基或任选被取代的苯基,并且是通过用氢氯酸盐反应相应的羧甲酸二异氰酸酯制备的。 。 化合物(I)可用于制备除草活性的4-氨基-1,2,4-三嗪-5-酮化合物。

    3,4-Dihydro-1,2,4-triazine compounds
    6.
    发明授权
    3,4-Dihydro-1,2,4-triazine compounds 失效
    3,4-二氢-1,2,4-三嗪化合物

    公开(公告)号:US3940391A

    公开(公告)日:1976-02-24

    申请号:US502249

    申请日:1974-08-29

    CPC分类号: A01N43/707 C07D253/07

    摘要: Novel 3,4-dihydro-1,2,4-triazine compounds of the formula ##SPC1##In whichR.sup.1 is alkyl or cycloalkyl;R.sup.2 is methyl, amino, alkylideneamino, methylamino, .beta.-hydroxyethylamino, 2-furylmethylamino, aralkylamino or substituted aralkylamino; and R.sup.3 is alkyl, aryl or substituted aryl;Are prepared by reacting the corresponding 1,2,4-triazin-5-one with sodium borohydride in the presence of a polar solvent at a temperature between -10.degree. and +25.degree.C. The novel compounds are outstandingly effective as herbicides and display particularly selective action.

    摘要翻译: 式III的新型3,4-二氢-1,2,4-三嗪化合物,其中R1是烷基或环烷基; R2是甲基,氨基,亚烷基氨基,甲基氨基,β-羟乙基氨基,2-呋喃甲基氨基,芳烷基氨基或取代的芳烷基氨基; 并且R 3是烷基,芳基或取代的芳基; 在-10℃和+ 25℃之间的温度下,在极性溶剂存在下,用硼酸钠反应相应的1,2,4-三唑-5-酮。这种新型化合物作为除草剂和显示效果显着 特别是选择性行动。