CAS: 1780-40-1; 2,4,5,6-Tetrachloropyrimidine

上下游产品

CAS号106351-49-9 5-硝基嘧啶-2,4,6-三酚 | CAS号21428-20-6 5,6-dichloro-1H... | CAS号67-52-7 巴比妥酸 | CAS号61066-33-9 pyrimidine-2,4,... | CAS号444-15-5 径尿酸 | CAS号10026-13-8 五氯化磷 | CAS号10025-87-3 三氯氧磷 | CAS号289-95-2 嘧啶 | CAS号767-79-3 2,4,5,6-四氟嘧啶 | CAS号319-87-9 Benzene,1,2,3,4... | CAS号697-83-6 5-氯-2,4,6-三氟嘧啶 | CAS号28969-60-0 4-氨基-2,5,6-三氯嘧啶

径尿酸置于五氯化磷,三氯氧磷体系中,化学反应生成2,4,5,6-四氯嘧啶
参考文献:Emery,Chemische Berichte,1901,Vol. 34,P. 4178,4180
标题:Emery,Chemische Berichte,1901,Vol. 34,P. 4178,4180

专利信息

专利号:US-2009076268-A1
优先权日:2007-09-14
标 题:Facile assembly of fused benzofuro-heterocycles
发明人：FITZGERALD ANNE E; LIU JING; MANI NEELAKANDHA S
权利人:FITZGERALD ANNE E; LIU JING; MANI NEELAKANDHA S
摘要:This invention concerns the synthesis of polycyclic structural components of pharmacological compounds, including the synthesis of fused benzofuro-heterocycles, through selective palladium-catalyzed cross-coupling and intramolecular cyclization.

专利号:US-4466900-A
优先权日:1981-09-22
标 题:Process for the preparation of fluorescent brightener formulations which are stable on storage
发明人：HORLACHER PAUL; PFENNINGER HEINZ
权利人:CIBA GEIGY CORP
摘要:A process is described for the preparation of concentrated liquid formulations, stable on storage, of anionic fluorescent brighteners, which process consists in passing a crude (for example obtained from synthesis) aqueous solution or dispersion of a fluorescent brightener containing sulfo groups, in particular a stilbene fluorescent brightener belonging to the group comprising bistriazinylaminostilbenedisulfonic acids, bis-styrylbiphenyls, bis-styrylbenzenes and bis-triazolylstilbenedisulfonic acids, is passed through a semipermeable membrane which contains ionic groups and has a pore diameter of 1-500 ANGSTROM in order to remove salts and by-products from the synthesis having molecular weights below 500 and in order to remove part of the water. The resulting concentrated preparation can, if desired, be concentrated further and/or treated with formulation assistants and, if desired, further additives.

专利号:US-4500321-A
优先权日:1980-06-04
标 题:Process for the preparation of concentrated fluid dye compositions
发明人：HUGELSHOFER PAUL; BRUTTEL BEAT; PFENNINGER HEINZ; LACROIX ROGER
权利人:CIBA GEIGY CORP
摘要:A process for the preparation of storage-stable concentrated fluid dye compositions of water-soluble dyes, wherein an aqueous solution or suspension of at least one anionic crude dye is passed over a semi-permeable membrane containing ionic groups and having a pore diameter of 1 to 500 ANGSTROM , to remove salts and synthesis by-products of molecular weights less than 500 and to partially remove water, optionally dried, and mixed with a water-miscible organic solvent and, if desired, further additives, before and/or after passage over the semi-permeable membrane. The fluid dye compositions obtained are particularly suitable for use in spray solutions for dyeing leather, as well as for the dying and printing of textile materials, in particular cellulosic fibres.

专利号:CN-107782805-A
优先权日:2016-08-25
标题:A kind of key intermediate impurity HPLC analysis method of dipyridamole synthesis