Synthesis of Benzo[<i>c</i>]xanthones from 2-Benzylidene-1-tetralones by the Ultraviolet Radiation-Mediated Tandem Reaction
作者:Wen-Zhi Xu、Zhi-Tang Huang、Qi-Yu Zheng
DOI:10.1021/jo8008929
日期:2008.7.1
A facile one-pot method to prepare benzo[c]xanthones from readily accessible benzylidene-1-tetralones by the ultraviolet radiation-mediated tandemreaction is reported. The overall transformation presumably involves cis−trans isomerization, oxa-6π electrocyclization, singlet oxygen ene reaction, dehydration, and aromatization.
报道了一种容易的一锅法,该方法通过紫外线介导的串联反应从容易获得的亚苄基-1-四氢萘酮制备苯并[ c ]氧杂蒽。整个转化可能涉及顺反异构化,oxa-6π电环化,单线态氧烯反应,脱水和芳构化。
Facile Synthesis of Functional Tricyclic Fused Furans by Intramolecular Wittig Reactions
作者:Yi-Ling Tsai、Utpal Das、Siang-en Syu、Chia-Jui Lee、Wenwei Lin
DOI:10.1002/ejoc.201300426
日期:2013.7
the preparation of tricyclic fused furans in one step starting from acid chlorides and Michael acceptors is described. The reaction conditions are mild, operationally simple, and have a broad substrate scope. The reaction is believed to proceed by an intramolecular Wittigreaction with a phosphorus ylide as the key intermediate.
2-Substituted-1-naphthols as potent 5-lipoxygenase inhibitors with topical antiinflammatory activity
作者:Douglas G. Batt、George D. Maynard、Joseph J. Petraitis、Joan E. Shaw、William Galbraith、Richard R. Harris
DOI:10.1021/jm00163a058
日期:1990.1
described. These compounds are potent inhibitors of the 5-lipoxygenase from RBL-1 cells and also inhibitbovine seminal vesicle cyclooxygenase. Structure-activity relationships for these two enzymes are different, implying specific enzyme inhibition rather than a nonspecific antioxidant effect. 2-(Aryl-methyl)-1-naphthols are among the most potent 5-lipoxygenaseinhibitors reported (IC50 values generally
A new series of 6,6a,7,8-tetrahydro-5H-naphtho[1,2-e]pyrimido[4,5-b][1,4]diazepines 4a-f and 5a-f were efficiently synthesized in good yields from the reaction of E-2-arylidene-1-tetralones 1 and the respective tri- or tetraaminopyrimidines 2 or 3 under microwave irradiation using DMF as solvent and catalytic amounts of BF3·OEt2. Six of the obtained compounds were selected and tested by the National
高效合成了一系列新的6,6a,7,8-四氢-5 H-萘[1,2- e ]嘧啶基[4,5- b ] [1,4]二氮杂卓4a - f和5a - f。在以DMF为溶剂和催化量的BF 3 ·OEt 2的微波辐射下,E -2-芳基-1-四氢萘醌1与相应的三氨基或四氨基嘧啶2或3的反应具有良好的收率。选择了六种获得的化合物,并由美国国家癌症研究所(NCI-USA)对60种不同的肿瘤细胞系进行了测试。特别是化合物5a,5c和5e在SK-MEL-5细胞系中表现出显着的针对黑素瘤癌症的抗肿瘤活性。