热可逆交联聚乙烯通过狄尔斯-阿尔德(DA)反应和逆狄尔斯-阿尔德(rDA)反应制备。使用马来酰亚胺/呋喃加合物作为交联剂。首先合成了名为 11-马来酰亚胺基十一烷酸的亲双烯体,并研究了该亲双烯体和商业 3-(2-呋喃基)丙酸之间的 DA 反应,以确定固态下的 DA 和 rDA 反应温度。然后,采用一种原始的改性方法将两个分子一步接枝到 Lotader® 聚(乙烯-共-甲基丙烯酸缩水甘油酯)上。二烯和亲二烯体接枝部分之间的 DA 和 rDA 反应通过薄膜上的 FT-IR 分析进行跟踪。聚合物网络很容易合成,DA 和逆 DA 反应的循环是可重复的,没有明显的聚合物降解。
Design, Synthesis, and Biochemical Evaluation of <i>N</i>-Substituted Maleimides as Inhibitors of Prostaglandin Endoperoxide Synthases
作者:Amit S. Kalgutkar、Brenda C. Crews、Lawrence J. Marnett
DOI:10.1021/jm950872p
日期:1996.1.1
N-(Carboxyalkyl)maleimides are rapid as well as time-dependent inhibitors of prostaglandin endoperoxide synthase (PGHS). The corresponding N-alkylmaleimides were only time-dependent inactivators of PGHS, suggesting that the carboxylate is critical for rapid inhibition. Several N-substituted maleimide analogs containing structural features similar to those of the nonsteroidal anti-inflammatory drug
Alkylating derivatives of amino acids and peptides. Synthesis of N-maleoylamino acids, [1-(N-maleoylglycyl)cysteinyl]oxytocin, and [1-(N-maleoyl-11-aminoundecanoyl)cysteinyl]oxytocin. Effects on vasopressin-stimulated water loss from isolated toad bladder
作者:Daniel H. Rich、Paul D. Gesellchen、Alex Tong、Al Cheung、Carl K. Buckner
DOI:10.1021/jm00244a011
日期:1975.10
A method for the preparation of N-maleoylamino acids and esters is reported. These compounds were shown to inhibit both the oxytocin-induced smooth muscle contraction in the isolated rat uterus and the vasopressin-induced water loss from the isolated toad bladder. The inhibitory ability of the maleimides in the toad bladder assay was found to be related to their corresponding partition coefficients by the equation: log 1/C = -0.055 (log P) 2 + 0.227 log P + 3.96. N-Maleoylamino acids can be coupled to peptides to form alkylating reagents which react rapidly with sulfhydryl groups. The synthesis of [1-(N-maleoylglycyl)cysteinyl]oxytocin (3) and [1=(N-maleoyl-11-aminoundecanoyl)cysteinyl]oxytocin (4) as potential affinity labeling reagents is described. These oxytocin analogs were shown to readily react with sulfhydryl-containing compounds; however, neither 3 nor 4 was seen to inhibit in the rat uterus assay at concentrations up to 3 times 10(-5)M. When tested on the mucosal and serosal surfaces of the toad bladder, assay inhibition was seen only on the mucosal surface. These results are discussed with respect to the possible existence of sulfhydryl groups at neurohypophyseal receptors.
GONZALEZ, DE, LA, CAMPA, J. I.;BARRALES-RIENDA, J. M.;GONZALEZ, RAMOS, J., AN. QUIM. REAL SOC. ESP. QUIM. <EX AN. QUIM. REAL SOC. ESP. FIS. Y QUIM.>+
作者:GONZALEZ, DE, LA, CAMPA, J. I.、BARRALES-RIENDA, J. M.、GONZALEZ, RAMOS, J.