在本研究中,我们描述了4-氨基香豆素和 4-( N-芳基)氨基香豆素衍生物的新型高效 C(sp 2 )−H 硫氰化反应的成功开发,使用 KSCN 作为硫氰化剂和 K 2 S 2 O 8在空气气氛和室温下在乙腈中作为氧化剂。最值得注意的一点是,反应在没有添加任何金属催化剂或强氧化剂和热量的情况下顺利进行,最终最大限度地减少了化学废物的产生。该反应符合绿色、可持续合成化学的要求,可广泛应用于有机合成和药物化学。
Screening for In Vitro Antimycobacterial Activity and Three-Dimensional Quantitative Structure-Activity Relationship (3D-QSAR) Study of 4-(arylamino)coumarin Derivatives
作者:Vijay Virsdoia、Mushtaque S. Shaikh、Atul Manvar、Bhavik Desai、Alpesh Parecha、Raju Loriya、Kinnari Dholariya、Gautam Patel、Vipul Vora、Kuldip Upadhyay、Karia Denish、Anamik Shah、Evans C. Coutinho
DOI:10.1111/j.1747-0285.2010.00997.x
日期:2010.11
The resurgence of tuberculosis and the emergence of multidrug‐resistant strains of Mycobacteria necessitate the search for new classes of antimycobacterial agents. We have synthesized a small library of 50 analogues of 4‐(arylamino)coumarins with various aromatic amines at the C4‐ position of the coumarin scaffold. The compounds were evaluated for antimycobacterial activity against Mycobacterium tuberculosis H37Rv with rifampicin as the standard. Of the molecules synthesized, compound 9 was found to be most potent with a minimum inhibitory concentration >6.25 μg/mL for 100% inhibition. In an effort to develop new and more effective molecules in this series, the relationship between structure and activity was investigated by comparative molecular field analysis. Various models were generated using comparative molecular field analysis alone and comparative molecular field analysis plus a hydropathy field (HINT). In all, eight models were generated with atom‐fit and field‐fit alignment strategies. The comparative molecular field analysis models (Models 3a and 4a) based on field‐fit alignment were the best with statistically good correlation coefficients (r2) and cross‐validated q2. The values of r2pred for the validation set were 0.469 and 0.516. Based on the comparative molecular field analysis contours, some insights into the structure–activity relationship of the compounds could be gained.