Reduction of 3-nitrophthalic anhydride by SnCl2 in different alcohols: a simple synthesis of alkyl 1,3-dihydro-3-oxo-2,1-benzisoxazole-4-carboxylates
作者:Hakima Chicha、Najat Abbassi、El Mostapha Rakib、Mostafa Khouili、Lahcen El Ammari、Domenico Spinelli
DOI:10.1016/j.tetlet.2013.01.037
日期:2013.3
A new, mild and efficient process is developed for the synthesis of alkyl 1,3-dihydro-3-oxo-2,1-benzisoxazole-4-carboxylates through the reduction of 3-nitrophthalic anhydride by SnCl2 in different alcohols. The synthesis of benzisoxazoles bearing a sulfonamide functionality is also reported. The structure of sulfonamide 8d is confirmed by X-ray diffraction analysis.