专利号:US-5436368-A 优先权日:1990-10-31 标题:Intermediates in the preparation of 4,5-difluoroanthranillic acid 发明人:BRAISH TAMIM F 权利人:PFIZER 摘要:Compounds of the formula ##STR1## which are intermediates in the preparation of 4,5-difluoroanthranilic acid, an intermediate itself in the synthesis of quinolone antibacterials, and methods of preparing these intermediates.
专利号:US-6770586-B2 优先权日:2000-04-24 标题 :Solid catalyst component and catalyst for olefins polymerization 发明人:TASHINO KUNIHIKO; SUZUKI YUKIHIRO; NISHIYAMA ISA; OGAWA HAYASHI; YOSHIDA TAKUMA; HOSAKA MOTOKI; SATO MAKI 权利人:TOHO TITANIUM CO LTD 摘要:Solid catalyst components and catalysts which contain (a) magnesium compound, (b) titanium tetrachloride, and (c) a phthalic acid diester or its derivative are useful in the synthesis of olefin polymers in high yields. Particularly, propylene polymers can be obtain in very high yields while retaining high stereoregularity.
专利号:CN-117586126-A 优先权日:2023-11-23 标题 :A kind of synthesis method of 4,6-dichloro-3-hydroxy-2-nitrobenzoic acid
专利号:CN-111470961-A 优先权日:2020-04-14 标 题:A kind of efficient synthesis method of halogenated 1,3-indanedione compounds