Quinazolin-2-ones Having a Spirohydantoin Ring. III. A General and Efficient Synthesis of 3'-Substituted Spiro(imidazolidine-4,4'(1'H)-quinazoline)-2,2',5(3'H)-triones.
Biological activities and quantitative structure-activity relationships of spiro[imidazolidine-4,4'(1'H)-quinazoline]-2,2',5(3'H)-triones as aldose reductase inhibitors
摘要:
A series of spiro[imidazolidine-4,4'(1'H)-quinazoline]-2,2',5(3'H)-triones were prepared and tested for aldose reductase inhibitory activity. The 6'-halogenated derivatives were found to be highly potent in vitro inhibitors of male rabbit lens aldose reductase and in vivo inhibitors of polyol accumulation in the sciatic nerves of galactosemic rats. Of these, (4R)-6'-chloro-3'-methylspiro[imidazolidine-4,4'(1'H)-quinazoline]-2,2',5(3'H)-trione (67) showed the most potent in vitro and in vivo activities. An oral dose of 3 g/kg of compound 67 caused neither death nor behavioral abnormality in the preliminary acute toxicity study using mice and rats. Compound 67 was selected as a candidate for further evaluation. The quantitative structure-activity relationships in this series are also discussed.
Eco-friendly chemoselective N-functionalization of isatins mediated by supported KF in 2-MeTHF
作者:Ashenafi Damtew Mamuye、Serena Monticelli、Laura Castoldi、Wolfgang Holzer、Vittorio Pace
DOI:10.1039/c5gc01002k
日期:——
A simple, versatile and eco-friendly approach to the functionalization of isatins.
一种简单、多功能且环保的对异喹啉的官能化方法。
Core-Structure-Motivated Design of a Phosphine-Catalyzed [3 + 2] Cycloaddition Reaction: Enantioselective Syntheses of Spirocyclopenteneoxindoles
作者:Bin Tan、Nuno R. Candeias、Carlos F. Barbas
DOI:10.1021/ja110147w
日期:2011.4.6
A novel organocatalytic asymmetric [3+2] cycloaddition reaction between methyleneindolinones and allylic compounds yielding complex spirocyclopentaneoxindoles has been developed. It provides extraordinary levels of enantioselective control involving a chiral phosphine as a nucleophilic organocatalyst. Simple precursors were used under mild conditions to construct oxindole derivatives with high enantiopurity
Effect of Structure of 1-Substituted Isatins on Direction of Their Reactions with Some Acetohydrazide Ammonium Derivatives
作者:A. V. Bogdanov、A. D. Voloshina、A. S. Sapunova、N. V. Kulik、V. F. Mironov
DOI:10.1134/s1070363220090029
日期:2020.9
Abstract The reaction of 1-acylisatins with Girard’s reagent T proceeds with elimination of the acyl substituent and the formation of isatin-3-hydrazone with a quaternary nitrogen atom in the side chain. Depending on the structure of the substituent in position 1, 1-(aminomethyl)isatins reacted with the Girard’s reagent T to form hydrazones either with the elimination of the aminomethyl substituent
An Unusual Polyheterocyclic Diversity by the π-Cyclisation of <i>N</i>-Carbamoyliminium Ion, with or without Tandem <i>N</i>,<i>N</i>-Acetal Cleavage, from Spiro(imidazolidinoquinazolinones)
作者:Adam Daïch、Anthony Pesquet、Servane Coste、Luc Van Hijfte
DOI:10.1055/s-2008-1067032
日期:2008.5
Spiro(imidazolidinoquinazolinones), obtained easily in one step from 1-carbamoylisatins, are readily converted in three steps by successive N-alkylations and sodium borohydride regioselective reduction into the corresponding hydroxyspirolactams. The latter are valuable platforms for further transformations via the intermediacy of N-acyliminium species and have been applied to the synthesis of original isoquinoloquinazoline, indoloquinazoline and imidazoindole derivatives.
Facile synthetic approach towards vasorelaxant active 4-hydroxyquinazoline-4-carboxamides
作者:Marian N. Aziz、Siva S. Panda、ElSayed M. Shalaby、Nehmedo G. Fawzy、Adel S. Girgis
DOI:10.1039/c9ra04321g
日期:——
A Facile syntheticapproach is reported towards 4-hydroxyquinazoline-4-carboxamides 13a–i through ring expansion of 2,3-dioxoindoline-1-carboxamides 10a–c during secondary amine 11a–d nucleophilic reaction. Single crystal X-ray studies of 10c and 13d support the structures. Some of the synthesized quinazolinecarboxamides 13 show promising vasorelaxant properties with potency higher than that of Doxazosin
据报道,通过在仲胺11a-d亲核反应期间2,3-二氧吲哚啉-1-甲酰胺10a-c的扩环,一种简便的合成方法可用于 4-羟基喹唑啉-4-甲酰胺13a-i 。10c和13d的单晶 X 射线研究支持这些结构。通过预收缩(去甲肾上腺素盐酸盐)大鼠主动脉标准生物测定,一些合成的喹唑啉甲酰胺13显示出有希望的血管舒张特性,其效力高于多沙唑嗪。良好的分子模型(2D-QSAR,药效团)描述了生物学观察。