CAS: 3674-09-7; Methyl 2,3-Dichloropropanoate

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73246-45-4 6001-87-2 616-23-9

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CAS号292638-85-8 丙烯酸甲酯 | CAS号67-56-1 甲醇 | CAS号107-13-1 丙烯腈 | CAS号50-00-0 甲醛 | CAS号79-01-6 三氯乙烯 | CAS号7623-13-4 2,3-二氯丙酰氯 | CAS号615-34-9 2,3-二羟基丙酸甲酯 | CAS号67-66-3 氯仿 | CAS号10026-13-8 五氯化磷 | CAS号7782-50-5 氯气 | CAS号598-79-8 2-氯丙烯酸 | CAS号80-63-7 2-氯丙烯酸甲酯 | CAS号5118-06-9 3-羟基-2-噻吩甲酸甲酯 | CAS号36997-03-2 methyl 2-chloro... | CAS号39822-32-7 methyl 2,2-diac...

Alkaline Earth Salt Of/the/ Methylsulfuric Acid置于氯体系中,化学反应生成 2,3-二氯丙酸甲酯
参考文献:De579654
标题:De579654

专利信息

专利号:US-5663365-A
优先权日:1996-10-29
标 题:Process for the preparation of pyrazolones
发明人：YAMAMOTO YASUO; SHIRAKAWA NAOKI; TAKANO SHINICHI; KAWAI YOSHIO
权利人:JAPAN HYDRAZINE CO LTD
摘要:A process for the preparation of pyrazolone derivatives represented by the general formula ##STR1## wherein R is a hydrogen atom, an alkyl group, an allyl group, an aryl group or an aralkyl group, and R 1 and R 2 are, respectively, a hydrogen atom, an alkyl group or a phenyl group which may have a substituent, comprising reacting a 2,3-dihalocarboxylic acid derivative or a 2-haloacrylic acid derivative with a hydrazine derivative. A pyrazolone or 1-substituted-3-pyrazolones useful as intermediate starting materials for the synthesis of agricultural chemicals, medicine and chemical compounds can be easily and cheaply prepared from widely used industrial starting materials.

专利号:US-6949676-B2
优先权日:2002-01-03
标 题:Alkyl esters of the 2-(2-fluorosulphonyl)-perfluoroethylenoxy-3-halogen-propionic acid
发明人：TORTELLI VITO; MACULAN SARA
权利人:AUSIMONT SPA
摘要:Compounds of formula CH 2 Y—CH(COOR 1 )—O—CF 2 CF 2 —SO 2 F, usable in the synthesis of the fluorosulphonic vinylether —CF 2 â•?CF—O—CF 2 CF 2 —SO 2 F.