Kinetics of the reactions of some 5-bromo-2-nitro-3-R-thiophens, 3,4-dibromo-2-nitro-5-R-thiophens, 3-bromo-2-nitro-5-R-thiophens, and 2-bromo-3-nitro-5-R-thiophens with nucleophiles in methanol
作者:Giovanni Consiglio、Domenico Spinelli、Salo Gronowitz、Anna-Britta Hörnfeldt、Britta Maltesson、Renato Noto
DOI:10.1039/p29820000625
日期:——
The reactivity of some 5-bromo-2-nitro-3-R-thiophens (la–g; R = H, Me, Et, Prn, n-hexyl, Pr1, and But), 3,4-dibromo-2-nitro-5-R-thiophens (IIa and b; R = H and Me), 3-bromo-2-nitro-5-R-thiophens (IIIa and b; R = H and Me), and 2-bromo-3-nitro-5-R-thiophens (IVa and b; R = H and Me) with amines and sodium benzenethiolate has been studied in-methanol at various temperatures. Piperidinodebromination of
一些5-溴-2-硝基- 3-R-thiophens的反应性(1a-g中; R = H,Me,乙基,丙基Ñ,正己基,镨1和Bu吨),3,4-二溴-2-硝基-5-R-噻吩(IIa和b; R = H和Me),3-溴-2-硝基-5-R-噻吩(IIIa和b; R = H和Me)和2-溴化3-硝基-5-R-噻吩(IVa和b; R = H和Me)与胺和苯硫醇钠在甲醇中的各种温度下进行了研究。还已经在苯,二恶烷和二恶烷水中(60:40和10:90)研究了化合物(Ia和C)的哌啶合溴化。不依赖于烷基的位置(间位或对位 关于离去的溴),已经观察到意外的烷基活化,这代表了烷基的电子释放行为的另一个例外。