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mooncakexzj
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phoxim
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zcp19841107
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4Â¥2010-04-01 18:33:14
cjg820
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zcp19841107
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6Â¥2010-04-03 18:14:48
cjg820
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zcp19841107(½ð±Ò+18):Ê®·Ö¸Ðл 2010-04-07 18:21
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¸ù¾ÝÆäÓ¢ÎÄÕªÒª£¬Ó¦¸Ã¾ÍÊÇN-¼×»ùßÁ¿©Íéͪ£¬N-methylpyrrolidone¡£ Improved method for preparation of clethodim with high yield and purity. Yu, Guoquan; Yu, Wei; Ji, Zhiyang; Wang, Jianrong. (Jiangsu Changqing Agrochemical Co., Ltd., Peop. Rep. China). Faming Zhuanli Shenqing Gongkai Shuomingshu (2009), 4pp. CODEN: CNXXEV CN 101575307 A 20091111 Patent written in Chinese. Application: CN 2009-10033391 20090611. Priority: . CAN 152:11880 AN 2009:1418219 CAPLUS Patent Family Information Patent No. Kind Date Application No. Date CN 101575307 A 20091111 CN 2009-10033391 20090611 Priority Application CN 2009-10033391 20090611 Abstract The title method comprises adding propanone compd. and a ketone compd. in petroleum ether, stirring, adding allyloxylamine compd., condensing at 25-20, washing with water, and removing solvent at 60-70 to give clethodim with high yield and purity. The ketone compd. is N-methylpyrrolidone, and its ratio to the propanone compd. is 3-5:100. With the ketone compd. as stabilization agent, the condensation reaction can be carried out at low temp., thus inhibiting the decompn. of clethodim. The yield reaches about 97%, and the purity reaches 94%. [ Last edited by cjg820 on 2010-4-6 at 13:52 ] |
7Â¥2010-04-06 13:40:18














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