Sequential 1,4‐/1,2‐Addition of Lithium(trimethylsilyl)diazomethane onto Cyclic Enones to Induce C−C Fragmentation and N−Li Insertion
作者:Matthew J. O'Connor、Chunrui Sun、Xinyu Guan、Venkata R. Sabbasani、Daesung Lee
DOI:10.1002/anie.201510152
日期:2016.2.5
α,β‐Unsaturated ketones generally undergo addition reactions with nucleophiles with a preference for either 1,2‐ or 1,4‐addition, but rarely both. However, the right combination of reagents allows for consecutive 1,4‐ and 1,2‐additions to occur: Cyclic α,β‐unsaturated ketones undergo double additions with lithium(trimethylsilyl)diazomethane, effectively generating various molecular frameworks with
<em>p</em>-TSA-promoted syntheses of 5H-benzo[h]thiazolo[2,3-b]quinazoline and indeno[1,2-d]thiazolo[3,2-a]pyrimidine analogs: molecular modeling and in vitro antitumor activity against hepatocellular carcinoma
作者:Amit K Keshari、Ashok K Singh、Vinit Raj、Amit Rai、Prakruti Trivedi、Balaram Ghosh、Umesh Kumar、Atul Rawat、Dinesh Kumar、Sudipta Saha
DOI:10.2147/dddt.s136692
日期:——
(C-C, C-N, and C=N) involving multiple steps without the use of any metal catalysts in one-pot, with all reactants effi-ciently exploited. All the newly synthesized compounds were authenticated by means of Fourier transform infrared spectroscopy, liquid chromatography-mass spectrometry, protonnuclearmagneticresonancespectroscopy, and carbon-13 nuclearmagneticresonancespectroscopy, together with
在应对肝细胞癌(HCC)发病率上升的努力中,我们致力于合成新型分子来对抗Hep-G2细胞。利用对甲苯磺酸(p-TSA)催化的多米诺骨牌Knoevenagel / Michael /分子内环化方法成功设计了一种简便高效的多组分反应,用于合成新型5H-苯并[h]噻唑并[2]带有桥头氮原子的,3-b]喹唑啉和茚并[1,2-d]噻唑并[3,2-a]嘧啶类似物。该多米诺协议通过同时形成多个键(CC,CN和C = N)而涉及多个步骤,从而在一个反应釜中不使用任何金属催化剂的情况下构造了一个新环,有效地利用了所有反应物。所有新合成的化合物均通过傅里叶变换红外光谱,液相色谱-质谱,质子核磁共振谱和碳13核磁共振谱以及元素分析进行了鉴定,并在体外对它们的抗肿瘤活性进行了评估。磺基罗丹明B测定法检测Hep-G2人癌细胞系。针对与癌症相关的靶标,包括白介素2,白介素6,Caspase-3和Caspase
Rational design, synthesis and molecular modeling studies of novel anti-oncological alkaloids against melanoma
作者:Adel S. Girgis、Siva S. Panda、Aladdin M. Srour、Hanaa Farag、Nasser S. M. Ismail、Mohamed Elgendy、Amal K. Abdel-Aziz、Alan R. Katritzky
DOI:10.1039/c5ob00410a
日期:——
Anti-oncological active spiro-alkaloids were synthesized exhibiting promising antitumor properties against melanoma cell lines. Molecular modeling studies describe the observed properties.
Synthesis and bioactivity studies on new 4-(3-(4-Substitutedphenyl)-3a,4-dihydro-3<i>H</i>-indeno[1,2-c]pyrazol-2-yl) benzenesulfonamides
作者:Halise Inci Gul、Mehtap Tugrak、Hiroshi Sakagami、Parham Taslimi、Ilhami Gulcin、Claudiu T. Supuran
DOI:10.3109/14756366.2016.1160077
日期:2016.11.1
A series of new 4-(3-(4-substitutedphenyl)-3a,4-dihydro-3H-indeno[1,2-c]pyrazol-2-yl) benzenesulfonamides (7-12) was synthesized starting from 2-(4-substitutedbenzylidene)-2,3-dihydro-1H-inden-1-one (1-6) and 4-hydrazinobenzenesulfonamide. The substituted benzaldehydes from which the key intermediate was prepared by introducing 2- or 4-substituents such as fluorine, hydroxy, methoxy, or the 3,4,5-trimethoxy