Preparative synthesis of 2,4-dinitrophenylalkanols
作者:P. M. Kochergin、I. S. Mikhailova、E. V. Aleksandrova
DOI:10.1007/bf02465777
日期:1998.8
4-dinitrophenylalkylsulfurie acids (C). The hydrolysis of compounds C in a dilute sulfuric acid yields 2,4-dinitrobenzyl and 13-(4-dinitrophenyl)ethyl alcohols 0II, IV). The fast stage in this process is apparently the hydrolysis of nitroesters I and II leading to the corresponding alcohols (A) and nitric acid. Alcohols A react with sulfuric acid to form its esters-4nitrophenylalkylsulfurie acids B (as is known
在本研究之前已知的 2,4-二硝基苯基链烷醇的唯一代表是通过多阶段工艺从苄基氯合成的 2,4-二硝基苯甲醇 [2 5]。作为早期工作的延续 [6],我们研究了浓硫酸对 4-硝基苄基 (I) 和 13-(4-硝基苯基)乙基 OI) 醇的硝基酯的作用。已确定这些化合物与α-硝基苯基烷基甲醇的硝基酯[6]相反,在28-420°C 下在9 3 96% 硫酸中表现出自硝化反应。该反应发生在苯环的 2 位并导致形成 2,4-二硝基苯基烷基硫酸 (C)。化合物C在稀硫酸中的水解产生2,4-二硝基苄基和13-(4-二硝基苯基)乙醇0II、IV)。该过程的快速阶段显然是硝基酯 I 和 II 的水解,产生相应的醇 (A) 和硝酸。醇 A 与硫酸反应形成其酯 - 4-硝基苯基烷基硫酸 B(众所周知,4-硝基苄醇在浓硫酸中溶解后形成 4-硝基苄基硫酸 [2])。最后,中间体芳烷基硫酸 B 在反应条件下进行硝化(30-40°,形成
The synthesis of (aminophenyl)alkanols by hydrogenation of (nitrophenyl)alkanol nitroesters
作者:P. M. Kochergin、I. S. Mikhailova、E. V. Aleksandrova
DOI:10.1007/bf02465833
日期:1998.11
14] and its reduction by hydrazine hydrate [2] to 13-4-aminophenylethanol [2, 14, 15] (in [15], neither the reducer type nor the reaction conditions and yields of amino alcohol were indicated). We have thoroughly studied the hydrogenation of ni= troesters of some 2-nitro-, 3-nitro=, 4-nitro-, and 2,4=dinitrophenylalkanols containing nitroester groups in the or-, 13-, and ~-positions with respect to the
The interaction of D,L-1-(4-nitrophenyl)ethanol with SOCl2 and P4O10 has been studied. In the reaction of D,L-1-(4-nitrophenyl)ethanol with SOCl2 a mixture of 1-(4-nitrophenyl)-1-chloroethane, 1,1'-bis-(4-nitrophenyl)diethyl ether, and 4-nitrostyrene (yield 21%) has been formed. The direction of reaction of D,L-1-(4-nitrophenyl)ethanol with P4O10 in toluene has been affected significantly by the order of reagents addition and the solution concentration. 4-Nitrostyrene has been obtained in the only case: the addition of P4O10 to a diluted solution of D,L-1-(4-nitrophenyl)ethanol and subsequent refluxing. Also the procedure of 4-nitrostyrene preparation via the cleavage of 2-(4-nitrophenyl)ethyl nitrate with alkoxy anion in the alcoholic solution has been upgraded.
Horner,L. et al., Justus Liebigs Annalen der Chemie, 1968, vol. 714, p. 91 - 111
作者:Horner,L. et al.
DOI:——
日期:——
Kochergin, P. M.; Blinova, L. S., Russian Journal of Organic Chemistry, 1994, vol. 30, # 10.1, p. 1556 - 1558