abdelraheem_mohamed

عبدالرحيم محمد احمد محمود

مدرس -

كلية العلوم

العنوان: جامعة سوهاج - كلية العلوم - قسم الكيمياء

5

إعجاب
7 1 5 8 4 5 252 396
107

أضيف حديثا
  • المقررات الدراسية 7
  • ملحقات المقررات الدراسية 1
  • واجبات المقررات الدراسية 5
  • المنشورات و المؤلفات 8
  • ساعات مكتبية 4
  • الاعلانات 5
  • عدد الملفات المرفوعه 1
  • كل التنزيلات 3

المنشورات و المؤلفات التي تحتوي علي الكلمة المفتاحية: Cyanogen Bromide

Synthesis of 2-(2-methyltetrazol-5-yl)-2,2-dinitroacetonitrile. Reaction of the nitrile group with diazomethane

2018-09-18 21:45:42 الكلمات المفتاحية Cyanogen Bromide, diazomethane, dinitroacetonitrile, dinitromethane, tetrazole, 1, 2, 3-triazole, denitration, 3-dipolar cycloaddition,
Synthesis of 2-(2-methyltetrazol-5-yl)-2,2-dinitroacetonitrile. Reaction of the nitrile group with diazomethane
The reaction of the silver salt of (2-methyltetrazol-5-yl)dinitromethane with cyanogen bromide led to the formation of 2-(2-methyltetrazol-5-yl)-2,2-dinitroacetonitrile. The nitrile group of the latter was capable of entering into 1,3-dipolar cycloaddition with diazomethane, giving a mixture of isomeric 2-methyl-5-[(_N_-methyl-1,2,3-triazol-4-yl)dinitromethyl]tetrazoles that were separated by column chromatography. Upon treatment with an alcohol solution of potassium hydroxide, denitration of the cycloaddition products occurred and ... إقراء المزيد

Synthesis of 2-(2-methyltetrazol-5-yl)-2,2-dinitroacetonitrile and its reaction with substituted nitrile N-oxides

2018-09-18 21:53:10 الكلمات المفتاحية Cyanogen Bromide, Dinitro, Silver Salt, White Crystal, Oxadiazole,
Synthesis of 2-(2-methyltetrazol-5-yl)-2,2-dinitroacetonitrile and its reaction with substituted nitrile N-oxides
A procedure of synthesis of 2-(2-methyltetrazol-5-yl)-2,2-dinitroacetonitrile has been developed and its reaction with substituted nitrile _N_-oxides has been investigated, proceeding by the mechanism of 1,3-dipolar cycloaddition and affording 2-methyl-5-[(1,2,4-oxadiazol-5-yl)(dinitro)methyl]-2_H_-tetrazoles. The latter react with KOH in ethanol forming the potassium salt of 2-methyltetrazol-5-yldinitromethane and substituted 5-hydroxy-1,2,4-oxadiazoles. إقراء المزيد

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