Probing the surface polarity of inorganic oxides using merocyanine-type dyes derived from barbituric acid
摘要:
描述了四种源自巴比妥酸和硫巴比妥酸的梅罗氰染料的固态复合物、溶剂色变和酸性颜色变行为,以及它们作为有色表面溶剂色变探针分子的应用。这些染料通过巴比妥酸、N-甲基巴比妥酸、N,N′-二甲基巴比妥酸和硫巴比妥酸与4-N,N-二甲基氨基肉桂醛的缩合反应获得。通过液态和固态NMR技术(1H MAS NMR、1H–1H DQ MAS NMR、13C CPMAS NMR)、单晶X射线分析、UV/vis和IR测量对这些染料进行了表征。研究了在43种溶剂中的溶剂色变,并通过Kamlet–Taft参数α、β和π*进行了解释。总体而言,这四种染料的溶剂色变特性主要受到氢键供体(HBD)能力和溶剂的极化性/偶极性的影响。研究了染料与氧化物和金属表面的相互作用。将它们的周色变行为与已知溶剂色变染料进行比较,以确定α、β和π*,即二氰基-双(1,10-菲咯啉)铁(II)复合物(1)、3-(4-氨基-3-甲基苯基)-7-苯基-苯并-[1,2-b:4,5-b']-二呋喃-2,6-二酮(2)和4-叔丁基-2-(二氰基亚甲基)-5-[4-(二乙氨基)苯基]-Δ3-噻唑啉(3)。巴比妥酸染料被用于探测钨(VI)氧化物和铁(III)氧化物等有色氧化物的表面极性。还研究了染料与锌和铝等金属之间的相互作用。
Mono C-alkylation and mono C-benzylation of barbituric acids through zinc/acid reduction of acyl, benzylidene, and alkylidene barbiturate intermediates
作者:Branko S. Jursic、Edwin D. Stevens
DOI:10.1016/s0040-4039(03)00111-4
日期:2003.3
Through systematic exploration of reaction conditions, very efficient preparative procedures for obtaining large quantities of substituted 5-alkyl and 5-benzylbarbituric acids were developed. The procedure involves a two step preparation in which the second step is zinc dust/acid reduction. For preparation of 5-alkylbarbiturates, the first step is the preparation of either 5-acyl or 5-alkylidenebarbiturate
Reductive C-alkylation of barbituric acid derivatives with carbonyl compounds in the presence of platinum and palladium catalysts
作者:Branko S Jursic、Donna M Neumann
DOI:10.1016/s0040-4039(01)00621-9
日期:2001.6
Effective synthetic procedures for the preparation of mono- and di-C-alkylated barbituricacidderivatives through palladium and platinum catalytic hydrogenation of solutions of barbituricacids (unsubstituted, N-mono, and N,N′-disubstituted barbituricacids) and carbonyl compounds (aliphatic and aromatic aldehydes and ketones).
The synthesis and evaluation of near-infrared probes with barbituric acid acceptors for<i>in vivo</i>detection of amyloid plaques
作者:Kaixiang Zhou、Hualong Fu、Liang Feng、Mengchao Cui、Jiapei Dai、Boli Liu
DOI:10.1039/c5cc03662c
日期:——
A new array of near-infrared probes containing barbituric acid acceptors has been developed as Aβ imaging agents.
一种包含巴比妥酸受体的近红外探针新阵列已被开发为Aβ成像试剂。
COMPOUNDS FOR USE IN CANCER THERAPY
申请人:Connor James R.
公开号:US20150065531A1
公开(公告)日:2015-03-05
Provided are methods and compositions for use in therapy, and in particular for treating cancer, preferably drug-resistant cancer, and/or radiation resistant cancer. The compounds may be used for reducing tumor size in a mammalian subject and for inducing apoptosis in a tumor cell. The methods are effective on tumor cells that are resistant to drugs such as temozolomide, doxorubicin, and geldanamycin, as well as non-resistant tumor cells. Further provided are barbiturate and thiobarbiturates diene compounds for use in treating cancer, and uses, methods and compositions relating to these compounds.
THERMAL AMPLIFICATION OF FREE RADICAL POLYMERIZATION INDUCED BY RED TO NEAR-INFRARED IRRADIATION
申请人:Universite de Haute-Alsace
公开号:US20200362061A1
公开(公告)日:2020-11-19
The present invention relates to compositions thermally curable on demand by red to near infrared irradiation, method of using same for thermal amplification of free radical polymerizations, and articles obtained by such method. The invention also relates to the use of a heat-generating dye in association with a thermal initiator for controlling the onset of thermal free radical polymerization.