Shelyazhenko, S. V.; Fialkov, Yu. A.; Yagupol'skii, L. M., Journal of Organic Chemistry USSR (English Translation), 1992, vol. 28, # 8.1, p. 1317 - 1324
compounds containing the difluoromethyl group, as it is considered a lipophilic hydrogenbonddonor that may act as a bioisostere of hydroxyl, thiol, or amine groups. A series of difluoromethyl anisoles and thioanisoles was prepared and their druglike properties, hydrogenbonding, and lipophilicity were studied. The hydrogenbond acidity parameters A (0.085–0.126) were determined using Abraham’s solute 1H
人们对含二氟甲基的有机化合物越来越感兴趣,因为它被认为是亲脂性的氢键供体,可以作为羟基,巯基或胺基的生物等排体。制备了一系列的二氟甲基茴香醚和硫代苯甲醚,并研究了它们的类药物性质,氢键和亲脂性。氢键酸度参数A(0.085–0.126)使用亚伯拉罕的溶质1 H NMR分析确定。发现二氟甲基基团以与硫酚,苯胺和胺基团相似的规模充当氢键供体,但不如羟基基团那样。尽管二氟被认为是亲油性增强组,实验Δlog的范围 P(水-辛醇)值日志( P(XCF 2 H)– log P(XCH 3))范围从-0.1到+0.4。对于这两个参数,在测量值和Hammettσ常数之间发现线性相关。这些结果可能有助于合理设计含有二氟甲基部分的药物。
2-Chloro-2,2-difluoroacetophenone: A Non-ODS-Based Difluorocarbene Precursor and Its Use in the Difluoromethylation of Phenol Derivatives
作者:Laijun Zhang、Ji Zheng、Jinbo Hu
DOI:10.1021/jo061799l
日期:2006.12.1
substance) preparation of 2-chloro-2,2-difluoroacetophenone (1) was achieved in high yield by using 2,2,2-trifluoroacetophenone as the starting material. Compound 1 was found to act as a good difluorocarbene reagent, which readily reacts with a variety of structurally diverse phenol derivatives 4 in the presence of potassium hydroxide or potassium carbonate to produce aryl difluoromethyl ethers 5 in good
Oxidation of primary aliphatic aldehydes with p-trifluoromethylphenyl(difluoro)-lambda(3)-bromane in dichloromethane at 0 degrees C afforded acid fluorides selectively In good yields, while that of aromatic aldehydes In chloroform at room temperature produced aryl difluoromethyl ethers. A larger migratory aptitude of aryl groups compared to primary alkyl groups during a 1,2-shift from carbon to an electron-deficient oxygen atom in bromane(III) Criegee-type intermediates will result in these differences in the reaction courses.
Photo-fluorodecarboxylation of 2-Aryloxy and 2-Aryl Carboxylic Acids
作者:Joe C. T. Leung、Claire Chatalova-Sazepin、Julian G. West、Montserrat Rueda-Becerril、Jean-François Paquin、Glenn M. Sammis
DOI:10.1002/anie.201206352
日期:2012.10.22
SUBSTITUTED HETEROCYCLIC COMPOUNDS AS TROPOMYOSIN RECEPTOR KINASE A (TRKA) INHIBITORS