CAS: 3926-62-3; Sma

上下游产品

chloroacetic acid sodium hydroxidemorpholin-4-ylacetic acid 2-(2-imino-1,2-dihydropyridin-1-yl)acetic acid N-phenylsulfonylglycine 2-[2-oxo-benzo[d]oxazole-3(2H)-yl]acetic acid

专利信息

专利号:US-11008285-B2
优先权日:2017-03-27
标 题 :Process for synthesis of mesotrione
发明人：GHARDA KEKI HORMUSJI; MATHUR SUCHET SARAN; JAIN NANDKUMAR JANARDAN; SATHE SHEKHAR VISHWANATH; DAMANIA PRAGNESH DALPATRAM
权利人:GHARDA CHEMICALS LTD
摘要:The present disclosure relates to a process for synthesis of mesotrione. The process comprises reacting 4-toluene sulfonyl chloride with alkali metal sulphite and alkali metal bicarbonate to obtain alkali metal toluene-4-sulfinate. The alkali metal toluene-4-sulfinate is reacted with alkali metal salt of monochloroacetic acid to obtain 4-methylsulfonyl toluene. Further, 4-methylsulfonyl toluene is nitrated to obtain 2-nitro-4-methylsulfonyl toluene. 2-nitro-4-methylsulfonyl toluene is oxidized and then halogenated to obtain 2-nitro-4-methylsulfonylbenzoyl halide. 2-nitro-4-methylsulfonylbenzoyl halide is reacted with alkali metal salt of 1,3-cyclohexanedione to obtain 3-(2-Nitro-4-methylsulfonylbenzoyloxy)cyclohexen-1-one which is reacted with base, a third fluid medium and cyanide ion source to obtain an amorphous mesotrione. The present disclosure also discloses the steps of converting the amorphous mesotrione to crystalline mesotrione having purity greater than 99%. The process of the present disclosure for preparing mesotrione is rapid, economic, and environment friendly.

专利号:US-7276571-B2
优先权日:2005-06-29
标题:Process for making phenylene dioxydiacetic acid and use thereof
发明人：DURAIRAJ RAJ B; TACKIE MICHAEL N
权利人:DURAIRAJ RAJ B; TACKIE MICHAEL N
摘要:A process for making phenylene dioxydiacetic acid comprises (a) contacting a dihydroxybenzene under reaction conditions with a salt of haloacetic acid in a solution without adding a haloacetic acid to produce a salt of phenylene dioxydiacetic acid; and (b) optionally converting the salt of phenylene dioxydiacetic acid to free phenylene dioxydiacetic acid. In some embodiments, 1,3-phenylene dioxydiacetic acid (RDOA) is made by reacting resorcinol with sodium chloroacetic acid in a reaction mixture with a pH in the range of about 7 to about 11 and at a temperature from about 70° C. to 105° C. By adjusting the reactions conditions, a relatively high yield of 1,3-phenylene dioxydiacetic acid (i.e., greater than 80%) is obtained. The purified acid can be used in the synthesis of polyester, such as polyethylene terephthalate.

专利号:HR-P20240308-T1
优先权日:2017-03-27
标题 :SYNTHESIS OF MESOTRIONE

专利号:ES-2972460-T3
优先权日:2017-03-27
标 题 :Process for the synthesis of mesotrione

专利号:US-2020031767-A1
优先权日:2017-03-27
标 题:A process for synthesis of mesotrione

专利号:BR-112019020131-A2
优先权日:2017-03-27
标题:process for synthesis of mesotrione