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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
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. (c) 2013 Elsevier Ltd. All rights reserved.
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Reference:
Benzisoxazole – Wikipedia,
,Benzisoxazole – an overview | ScienceDirect Topics