Reduction of nitro- and nitroso-compounds by tervalent phosphorus reagents. Part V. Reduction of alkyl- and methoxy-nitrobenzenes, and nitrobenzene by trialkyl phosphites
作者:J. I. G. Cadogan、D. J. Sears、D. M. Smith、M. J. Todd
DOI:10.1039/j39690002813
日期:——
In some cases low (⩽18%) yields of dialkyl alkyl-3H-azepin-7-ylphosphonates are formed, indicating the intermediacy of nitrenoid species. Reaction of triethyl phosphite with p-ethyl-, p-methyl-, and p-methoxynitrobenzenes, and of trimethyl phosphite with o-nitroanisole and p-nitrotoluene give low yields of the corresponding dialkyl arylphosphonates, representing the first recorded instances of displacement
三乙基-和三甲基-亚磷酸酯用的反应ö, -米- ,和p硝基甲苯,ö -和p -ethylnitrobenzene,ö -和p -nitroanisole,和硝基苯得到二烷基相应Ñ -arylphosphoramidates,和二烷基Ñ -烷基N-芳基膦酸酯,以及在某些情况下,三烷基N-芳基膦酸酯,可能是上述酰胺化物的前体。在某些情况下,形成了3 H-氮杂庚基-7-基膦酸二烷基烷基酯的低产率(约18%),这表明亚硝基物质是中间产物。亚磷酸三乙酯与对-乙基,对-甲基和对甲氧基硝基苯以及亚磷酸三甲酯与邻-硝基苯甲醚和对硝基甲苯的收率低,这是记录的第一个记录的简单实例,该例子是简单的芳族硝基被未活化的取代电子影响或特殊的空间因素。