七种苯并[ c ] [1,2,5]噻二唑(BTD)的合成,光学表征和计算模型)报道了供体-受体染料。这些染料已使用电化学分析,电子吸收,发射,拉曼光谱和共振拉曼光谱学以及各种密度泛函理论方法进行了研究。还报道了许多这些化合物的晶体结构几何形状。光谱主要由低能量的电荷转移状态决定。这可以通过施主和受体之间的耦合,施主能量的变化,施主-受体扭转角的变化以及绝缘桥的结合来调节。这些修改导致该电荷转移跃迁的激发能微扰至约2000 cm –1。发射光谱显示出显着的溶剂化色氨酸,Lippert-Mataga分析得出的Δμ在8至33 D之间。将通过M06L,B3LYP,PBE0,M06,CAM-B3LYP和ωB97XDDFT功能计算出的预测的λmax,ε和拉曼横截面进行了比较实验结果并使用多变量分析进行了分析,结果表明,具有20%至27%HF的杂合功能最能预测基态吸收,而远程校正功能最能预测分子极化率。
Pd(II)-catalyzed aerobic intermolecular 1,4-diamination of conjugated dienes: A regioselective [4+4] annulation for the construction of medium-ring 1,6-benzodiazocine derivatives
The first metal-catalyzed oxidative intermolecular 1,4-diamination of conjugateddienes has been developed. A series of medium ring compounds were constructed via palladium-catalyzed intermolecular [4+4] annulations. Oxygen was successfully used as an oxidant instead of the existing stoichiometric metals or hypervalent iodine reagents. 20 examples are reported, and good yields and regioselectivities
Bissulfonamide derivatives of formula (I) are capable of inhibiting: a) the biosynthesis of aromatic amino acids via the shikimate pathway and b) the catabolism of quinic acid, wherein: Ar is an aryl or heteroaryl group; R1 and R2 are the same or different and each represent hydrogen or alkyl or R1 and R2 together form a C1-C3 alkylene group, -CO- or -CS-; and R3 and R4 are the same or different and each represent -alkyl-aryl, -alkyl-heteroaryl, -alkenyl-aryl, -alkenyl-heteroaryl, -alkynyl-aryl-alkynyl-heterorayl, aryl or heteroaryl.