<i>N</i>-Benzoyl- and <i>N</i>-Sulfonyl-1,5-benzodiazepines: Comparison of Their Atropisomeric and Conformational Properties
作者:Tetsuya Yoneda、Hidetsugu Tabata、Jun Nakagomi、Tomohiko Tasaka、Tetsuta Oshitari、Hideyo Takahashi、Hideaki Natsugari
DOI:10.1021/jo5008509
日期:2014.6.20
The atropisomeric and conformational properties of 1,5-benzodiazepines with an N-sulfonyl (p-tosyl/mesyl) group (IIa/b) were investigated by comparison with those of the N-benzoyl congeners (I). Similar to I, when the Ar–N(SO2) axis was frozen by a C9-substitution in the molecules, IIa/b were separated into the (aR)- and (aS)-atropisomers. The conformation of IIa/b revealed that the substituent (p-tolyl/methyl
通过与N-苯甲酰基同类物(I)的比较,研究了具有N-磺酰基(对甲苯甲酰基/甲磺酰基)(IIa / b)的1,5-苯并二氮杂a的阻转异构和构象性质。类似于我,当氩-N(SO 2)轴是由在分子中一个C9取代冷冻,IIA / b被分离成(A - [R )-和(一个小号)-atropisomers。IIa / b的构象表明取代基(p在磺酰基部分甲苯基/甲基)占地在固体和溶液状态都[例如,(+)二氮杂环(折叠形式)的位置- (A - [R )- ñ - p甲苯磺酰- 1,5-苯并二氮杂-2-酮(IIA-2)〕,而那的我是反向二氮杂环[例如,( - ) - (一- [R )- ñ -苯甲酰基- 1,5-苯并二氮杂-2-酮(I- 2)],这得到了计算研究的进一步支持。的立体化学稳定性也两个同类物(例如,Δ之间不同ģ ⧧:104千焦/摩尔为I-2对和132千焦/摩尔IIa-2)。