Synthesis of New Tri- and Tetraheterocyclic Systems: 1,3-Dipolar Cycloaddition of Nitrilimines on 2,7-Dimethyl-4-Phenyl-3H-1,5-Benzodiazepine
摘要:
We report here a one-step synthesis of a new series of tri and tetraheterocyclic systems by the mixed condensation reactions of N-aryl-C-ethoxycarbonylnitrilimines and diarylnitrilimines with 2,7-dimethyl-4-phenyl-3H-1,5-benzodiazepine. This 1,3-dipolar cycloaddition is completely peri and regioselective. The structure of these products has been confirmed by H-1, C-13 NMR, mass spectroscopic and X-ray crystallographic analysis.
Facile synthesis of hydrazonyl halides by reaction of hydrazones with N-halosuccinimide-dimethyl sulfide complex
作者:Himatkumar V. Patel、Kavita A. Vyas、Sudhanshu P. Pandey、Peter S. Fernandes
DOI:10.1016/0040-4020(95)00916-7
日期:1996.1
new and convenient method is described for the synthesis of hydrazonylhalides. Hydrazones on treatment with N-chlorosuccinimide-dimethyl sulfidecomplex result in the formation of the corresponding hydrazonyl chlorides in good yields. Similarly, treatment of hydrazones with N-bromosuccinimide-dimethyl sulfidecomplex gives the corresponding hydrazonyl bromide under extremely mild conditions.
We report here a one-step synthesis of a new series of tri and tetraheterocyclic systems by the mixed condensation reactions of N-aryl-C-ethoxycarbonylnitrilimines and diarylnitrilimines with 2,7-dimethyl-4-phenyl-3H-1,5-benzodiazepine. This 1,3-dipolar cycloaddition is completely peri and regioselective. The structure of these products has been confirmed by H-1, C-13 NMR, mass spectroscopic and X-ray crystallographic analysis.