Novel one-pot cyclization of ortho substituted benzonitriles to 3-amino-1,2-benzisoxazoles
作者:M.G. Palermo
DOI:10.1016/0040-4039(96)00425-x
日期:1996.4
(iii), from ortho substituted benzonitriles (i), is described. The synthesis likely involves a SnAr reaction of an activated ortho halo or nitro group by a hydroxamate anion, followed by an intra-molecular ring closure. 3-Amino-1,2-benzisoxazoles (iii) can be generated quickly in comparable or superior yields via this one-pot procedure when compared to other methods.1,2 Reaction parameters and conditions
描述了一种由邻位取代的苄腈(i)合成的3-氨基-1,2-苯并恶唑(iii)的新型一锅法。合成可能涉及活化的SNAR反应邻由异羟肟酸阴离子卤素或硝基,随后分子内闭环。与其他方法相比,通过这种一锅法可以快速生成3-氨基-1,2-苯并恶唑(iii),产量可比或更高。1,2给出了反应参数和条件。