Solvent free preparation of N-substituted maleanilic acid
作者:H. Saedi
DOI:10.4314/bcse.v27i1.15
日期:——
Six N-maleanilic acids namely N-(4-carboxy)maleanilic acid (CAMAA), N-(4-bromo)maleanilic acid (BMAA), N-(4-hydroxy)maleanilic acid (HMAA), N-(3-hydroxy)maleanilic acid (mHMAA), N-(4-chloro)maleanilic acid (CMAA) and N-(4-methyl)maleanilic acid (MMAA) were prepared by solvent free reaction between maleic anhydride and a 4-carboxy, 4-bromo, 4-hydroxy, 3-hydroxy, 4-chloro and 4-methyl aniline derivatives in good to excellent yield. FT-IR, 1H-NMR and 13C-NMR spectra revealed the confirmation of these compounds in good agreement.
Synthesis and antimicrobial activities of N-substituted imides
作者:Frederic Zentz、Alain Valla、Regis Le Guillou、Roger Labia、Anne-Gabrielle Mathot、Danielle Sirot
DOI:10.1016/s0014-827x(02)01217-x
日期:2002.4
toluene. Most of N-substituted maleimides showed an interesting antimicrobialactivity towards bacteria from the ATCC collection (Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922 and Pseudomonas aeruginosa ATCC 27853) but the MIC values for P. aeruginosa were always high (128 microg/ml). The imides with alkyl substituents showed higher activities than aromatic
Process for the production of N-(hydroxyphenyl) maleimides
申请人:Mitsui Toatsu Chemicals, Incorporated
公开号:US04231934A1
公开(公告)日:1980-11-04
N-(hydroxyphenyl) maleimides of the general formula ##STR1## where R' stands for H, CH.sub.3, C.sub.2 H.sub.5, F, Cl, Br or I and n is an integer of 1-5 are produced by treating the corresponding maleamic acid or by treating the ester of said N-(hydroxyphenyl) maleimide at a temperature of 0-150.degree. C. in the presence of at least one dehydrating agent selected from the group consisting of oxides and oxyacids of sulfur or phosphorus and alkali metal and alkaline earth metal salts of the said oxyacids. The corresponding maleamic acid can be obtained by reacting an aminophenol having one or more hydroxyl groups on its phenyl nucleus with maleic anhydride. The esters of the N-(hydroxyphenyl maleimide) can be obtained by reacting said aminophenol and said maleic anhydride in the presence of a conventional acid anhydride dehydrating agent and a conventional imide-forming cyclization catalyst.
against the time of incubation at several different inhibitor concentrations were determined. The K(i) for reversible competitiveinhibitors was determined. For irreversible inhibitors the K(i) for the dissociationconstant of the enzyme-inhibitor complex at the beginning of the recognition process was also determined as well as the inactivation constant of the enzyme-inhibitor adduct formation k(+2) and
Rubber stocks containing a metal salt of hydroxy aryl substituted
申请人:The Goodyear Tire & Rubber Company
公开号:US05872167A1
公开(公告)日:1999-02-16
The present invention relates to rubber stocks containing a metal salt of hydroxy-aryl substituted maleamic acid. The rubber stocks compounded with the cobalt salts of hydroxy-aryl substituted maleamic acid exhibit improved aged rubber/wire adhesion. The rubber stocks compounded with sodium salts of hydroxy-aryl substituted maleamic acid exhibit improved peel adhesion.