Process for preparing 4,6-dichloro-pyrimidine
    4.
    发明授权
    Process for preparing 4,6-dichloro-pyrimidine 失效
    制备4,6-二氯 - 嘧啶的方法

    公开(公告)号:US6018045A

    公开(公告)日:2000-01-25

    申请号:US875896

    申请日:1997-07-17

    IPC分类号: C07D239/30

    CPC分类号: C07D239/30

    摘要: A process for preparing 4,6-dichloropyrimidine is described, comprising treating 4,6-dihydroxypyrimidine with phosphorus oxychloride in the presence of a saturated hindered amine, the hydrochloride salt of a saturated hindered amine, or an unsaturated 5-membered nitrogen containing ring or a mixture thereof, and, as a first step, directly extracting the 4,6-dichloropyrimidine so formed.

    摘要翻译: PCT No.PCT / GB96 / 00013 Sec。 371日期1997年7月17日 102(e)日期1997年7月17日PCT 1996年1月4日PCT PCT。 公开号WO96 / 23776 日本1996年8月8日描述了制备4,6-二氯嘧啶的方法,包括在饱和受阻胺的存在下,用三氯氧化磷处理4,6-二羟基嘧啶,饱和受阻胺的盐酸盐或不饱和5- 并且作为第一步,直接提取如此形成的4,6-二氯嘧啶。

    Chemical process
    5.
    发明授权
    Chemical process 失效
    化学工艺

    公开(公告)号:US6096892A

    公开(公告)日:2000-08-01

    申请号:US191491

    申请日:1998-11-13

    IPC分类号: C07D239/54 C07D239/52

    CPC分类号: C07D239/54

    摘要: A process for preparing 4,6-dihydroxypyrimidine comprising the steps:a) contacting formamide, an alkoxide of formula ROM and a malonate of formula CH.sub.2 (CO.sub.2 R).sub.2 in a solvent of formula ROH;b) adding water to the product of step (a);c) removing substantially all of the solvent of formula ROH from the product of step (b); andd) acidifying the product of step (c)wherein R is C.sub.1-4 alkyl and M is an alkali metal.

    摘要翻译: 制备4,6-二羟基嘧啶的方法,包括以下步骤:a)在式ROH的溶剂中将甲酰胺,式ROM的醇盐和式CH 2(CO 2 R)2的丙二酸酯接触) b)向步骤(a)的产物中加入水; c)从步骤(b)的产物中基本上除去所有式ROH的溶剂; 和d)酸化步骤(c)的产物,其中R是C 1-4烷基,M是碱金属。

    Process for the preparation of 2-(6-substituted pyrid-2-yloxymethyl)
phenylacetate
    6.
    发明授权
    Process for the preparation of 2-(6-substituted pyrid-2-yloxymethyl) phenylacetate 失效
    2-(6-取代吡啶-2-基氧基甲基)苯乙酸酯的制备方法

    公开(公告)号:US6015905A

    公开(公告)日:2000-01-18

    申请号:US973252

    申请日:1997-12-02

    CPC分类号: C07D213/64

    摘要: A process for preparing 2-(6-substituted pyrid-2-yloxymethyl)phenyacetates especially useful as intermediates for producing agricultural fungicides. The invention provides a compound having the formula (I): wherein A and D are independently selected from the group comprising halo, hydroxy, halo(C.sub.1-4)alkyl, C.sub.1-4 alkoxy, thio(C.sub.1-4)alkoxy, halo(C.sub.1-4)alkoxy, phenyl, phenoxy, nitro, amino, aclyamino, cyano, carboxy, C.sub.1-4 alkoxycarbonyl and C.sub.1-4 alkylcarbonyloxy, or D is C.sub.1-4 alkyl, and m is 0 or an integer of from 1 to 3. The process comprises treating a compound of formula (II): ##STR1## wherein A, D and m are defined as above and M is a metal atom, with a compound of formula (III): ##STR2## wherein L is a leaving group.

    摘要翻译: PCT No.PCT / GB96 / 01311 Sec。 371日期1997年12月2日第 102(e)1997年12月2日PCT PCT 1996年6月3日PCT公布。 出版物WO97 / 01538 PCT 日期1997年1月16日一种制备2-(6-取代吡啶-2-基氧基甲基)苯乙酸酯的方法,特别可用作生产农业杀真菌剂的中间体。 本发明提供具有式(I)的化合物:其中A和D独立地选自卤素,羟基,卤代(C 1-4)烷基,C 1-4烷氧基,硫代(C 1-4)烷氧基,卤代(C1 -4)烷氧基,苯基,苯氧基,硝基,氨基,酰氨基,氰基,羧基,C 1-4烷氧基羰基和C 1-4烷基羰氧基,或D为C 1-4烷基,m为0或1〜3的整数。 该方法包括处理式(II)化合物:其中A,D和m如上定义,M为金属原子,与式(III)化合物反应:其中L为离去基团。

    Chemical process
    7.
    发明授权
    Chemical process 失效
    化学工艺

    公开(公告)号:US07491834B2

    公开(公告)日:2009-02-17

    申请号:US10513564

    申请日:2003-04-08

    IPC分类号: C07D311/00

    CPC分类号: C07D311/76

    摘要: 3-Isochromanone is prepared by partially chlorinating o-tolylacetic acid with sulphuryl chloride or chlorine gas in an inert organic solvent in the presence of a free radical initiator. The 2-chloromethylphenylacetic acid first obtained is converted to 3-isochromanone by treatment with a base and separated from unreacted o-tolylacetic acid, which is in the form of a salt, by a phase separation technique. The separated o-tolylacetic acid salt is converted to o-tolylacetic acid by controlled acidification and the o-tolylacetic acid is extracted for re-use. The invention reduces the formation of unwanted, over-chlorinated by-products and leads to a more efficient process.

    摘要翻译: 通过在惰性有机溶剂中,在自由基引发剂的存在下,用硫酰氯或氯气部分氯化邻甲苯乙酸来制备3-异色满酮。 首先将得到的2-氯甲基苯乙酸通过用碱处理转化为3-异色满酮,并通过相分离技术从盐形式的未反应的邻甲苯乙酸中分离出来。 通过控制酸化将分离的邻甲苯基乙酸盐转化为邻甲苯乙酸,并将邻甲苯基乙酸萃取再次使用。 本发明减少了不需要的过氯化副产物的形成并导致更有效的方法。