Highly Regio‐ and Diastereoselective 1,3‐Dipolar Cycloaddition of Nitrile Oxides to 2,4‐Dimethyl‐3H‐1,5‐Benzodiazepines: Synthesis of Bis[1,2,4‐Oxadiazolo][1,5]Benzodiazepine Derivatives
作者:K. Nabih、A. Baouid、A. Hasnaoui、A. Kenz
DOI:10.1081/scc-200031020
日期:2004.1.1
Abstract The 1,3‐dipolar cycloaddition reaction of nitrile oxides to 2,4‐dimethyl‐3H‐1,5‐benzodiazepines 1a–1c led, with completely regio‐ and diastereoselectivity, to new 3a,4a,8,13‐tetrahydro‐4H‐bis[1,2,4‐oxadiazolo][4,5‐a:5′,4′‐d][1,5]benzodiazepines 3a–3g. The structures of the synthesized bis‐adducts 3a–3g were elucidated by spectral methods and X‐ray crystallographic analysis.
摘要 腈氧化物与 2,4-二甲基-3H-1,5-苯二氮卓类 1a-1c 的 1,3-偶极环加成反应导致具有完全区域选择性和非对映选择性的新型 3a,4a,8,13-四氢- 4H-双[1,2,4-恶二唑并][4,5-a:5',4'-d][1,5]苯二氮卓类3a-3g。通过光谱方法和 X 射线晶体学分析阐明了合成的双加合物 3a-3g 的结构。