Atropisomeric properties of 5N-benzoyl-1,5-benzodiazepin-2-one with two Ar−N(CO) axes moving like gears were investigated. The rotationalbarrier (ΔG≠) of the axes was strongly influenced by the electronic effect of the p-substituent on benzoyl, and the electron-withdrawing group (EWG) increased the stability of the axes. The ΔG≠ values were linearly correlated with the electronic effect (the Hammett
Latent chirality: Atropisomerism in the vaptanclass of vasopressinreceptorligands with N‐benzoyl benzo‐fused seven‐membered‐ring nitrogen heterocycles was investigated by freezing the axis by ortho substitution. The aS/aR atropisomers caused by the ArN(CO) axis were separated to reveal that the vasopressinreceptorrecognizes the cis,aS conformation (see picture; R=CH3, X=CO, Y=H) when it binds
潜在手性:通过邻位 取代冻结轴,研究了带有N-苯甲酰基苯并-稠合的七元环氮杂环的血管加压素受体配体的vaptan类中的阻转异构。在一个小号/ A - [R 所造成的阻转异构体的Ar N(CO)轴分离以显示该加压素受体识别的顺式,一个小号 构象(参见图片; R = CH 3,X = CO ,Y = H)当它与配体结合时。