Atropisomerism in the 2,3,4,5-Tetrahydro-1H-1,5-benzodiazepine Nucleus: Effects of Central Chirality at C3 on the N-Mesylation Reaction
作者:Hidetsugu Tabata、Hideyo Takahashi、Hideaki Natsugari、Yuka Tsuji、Tetsuya Yoneda、Tomohiko Tasaka、Tetsuta Oshitari
DOI:10.1055/s-0037-1609868
日期:2018.10
The mesylation reaction of the 1,3-dimethyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine nucleus was investigated in detail. Two diastereomers (A and B) of 5-mesyl-1,3-dimethyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepines, originating from chirality at C3 and at the Ar–N(SO2) axis were formed, among which isomers of the derivative with a methyl group at C6 (R = CH3) were separable at room temperature. A
详细研究了 1,3-二甲基-2,3,4,5-四氢-1H-1,5-苯二氮卓核的甲磺酰化反应。5-mesyl-1,3-dimethyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepines 的两种非对映异构体(A 和 B),源自 C3 和 Ar-N(SO2) 处的手性形成了轴,其中在 C6 处具有甲基的衍生物的异构体 (R = CH3) 在室温下是可分离的。A 和 B 分别具有椅子状和船状构象,其中 C3-甲基采用伪赤道排列。此外,A 和 B 分别被证明是热力学和动力学控制的产物。