评估了卤素取代的1,4-二苯基-1,2,3-三唑化合物的分子内六元C–H⋯X(X = F,Cl,Br)氢键基序。已经设计和制备了十二种三唑衍生物,它们在苯环的邻位和/或对位带有氟,氯或溴原子。1 H NMR,X射线晶体学和DFT计算研究表明,三唑单元C-4上苯环的邻氟,氯和溴原子均可形成六元C–H⋯X氢粘接。相反,仅氟在三唑单元的N-1侧形成相似的,相对稳定的分子内氢键。
Palladium-catalyzed acetoxylation of arenes by 1,2,3-triazole-directed C<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mrow><mml:mtext /></mml:mrow></mml:math>H activation
A facile and efficient method for the regioselective acetoxylation of 1,4-disubstituted 1,2,3-triazoles via Pd-catalyzed CH bond activation was developed. The cheap acetic acid was applied as the acetoxyl source to convert aromatic sp2 CH bonds into CO bonds in high regioselectivity, employing 1,2,3-triazole as an elegant directing group and K2S2O8 as the oxidant. A range of 1,2,3-triazoles bearing
通过Pd催化的C对1,4-二取代的1,2,3-三唑进行区域选择性乙酰氧基化的简便有效方法开发了H键激活。廉价的乙酸用作乙酰氧基源以转化芳香族sp 2 CH键成C键以1,2,3-三唑为优美的导向基团,以K 2 S 2 O 8为氧化剂,以高区域选择性形成O键。通过该反应可以容易地合成一系列带有乙酰氧基的1,2,3-三唑。