Synthetic exploitation of the ring-opening of 3,4-dinitrothiophene. Access to 1,4-disubstituted 2,3-dinitro-1,3-butadienes and 2,3-diaminobutanes
作者:Carlo Dell'Erba、Marino Novi、Giovanni Petrillo、Domenico Spinelli、Cinzia Tavani
DOI:10.1016/0040-4020(95)01113-7
日期:1996.2
The reactions of 1,4-bis(diethylamino)-2,3-dinitro-1,3-butadiene 1 (deriving from ring-opening of 3,4-dinitrothiophene with diethylamine) with one mole of Grignard reagents give, together with disubstituted products 1,4-dialkyl- and 1,4-diaryl-2,3-dinitro-1,3-butadienes 2, the monosubstituted 1-alkyl-4-diethylamino- and 1-aryl-4-diethyl-amino-2,3-dinitro-1,3-butadienes 8 in yields dependent on the
1,4-双(二乙氨基)-2,3-二硝基-1,3-丁二烯1(源自3,4-二硝基噻吩与二乙胺的开环反应)与一摩尔格利雅试剂的反应得到双取代产物1,4-二烷基-和1,4-二芳基-2,3-二硝基-1,3-丁二烯2,单取代的1-烷基-4-二乙基氨基-和1-芳基-4-二乙基氨基-2, 3-二硝基-1,3-丁二烯8的产率取决于所用试剂的性质。芳基取代的化合物8与芳基格氏试剂进行高度区域选择性反应,以提供良好的1-Ar 1 -4-Ar 2 -2,3-二硝基-1,3-丁二烯9产率。。关于一些二硝基丁二烯2和9转化为相应的1,4-二取代的2,3-二氨基丁烷10的初步结果也有报道。