专利号:US-4136033-A 优先权日:1969-11-07 标 题:6-hydroxypyridone-2 compounds having a cationic group in the 3-position 发明人:STEINEMANN WILLY 权利人:SANDOZ LTD 摘要:Compounds of the formula ##STR1## wherein K.sup.⊕ is a cationic group, preferably heterocyclic, n R is hydrogen or an organic radical, preferably alkyl, phenyl or acyl, n R 1 is hydrogen, hydrocarbyl, substituted hydrocarbyl, heterocyclyl, substituted heterocyclyl, amino or substituted amino, and n A.sup.⊖ is an anion, n Are useful as intermediates in the synthesis of azo dyes of the formula ##STR2## wherein D is an aromatic carbocyclic or heterocyclic diazo component radical, and n K.sup.⊕, r, r 1 and A.sup.⊖ are as defined above.
专利号:EP-2528900-B1 优先权日:2010-01-29 标 题:Synthesis of substituted pyrazoline carboxamidine derivatives
参考文献:10.1007/s00216-024-05361-2 摘要:Dou Q, Canavan A, Fu Y, Xiang L, Wang Y, Wang X, Jiang X, Dirr C, Wang F, Elsner M. Nitrogen stable isotope analysis of sulfonamides by derivatization-gas chromatography-isotope ratio mass spectrometry. Anal Bioanal Chem. 2024 Jun 07;416(19):4237–47. doi: 10.1007/s00216-024-05361-2.