Facile Regiocontrolled Synthesis of Trialkyl-Substituted Pyrazines
摘要:
alpha-Nitro ketones can be transformed selectively into trialkyl-substituted pyrazines via reaction with a-amino ketones using octyl viologen as an electron-transfer reagent. The new synthetic method, and the optimal reaction conditions that allow for the regiochemical control, are described.
A New Synthetic Method for the Preparation of Ketones by Denitration of α-Nitro Ketones
作者:Noboru Ono、Masayuki Fujii、Aritsune Kaji
DOI:10.1055/s-1987-27995
日期:——
The sequence of acylation of nitroalkanes and subsequent denitration of the resulting α-nitro ketones provides a new and general method for the preparation of ketones.
A novel reactivity of α-nitro ketone tosylhydrazones with DBU. Synthesis of α,β-unsaturated enone tosylhydrazones
作者:Roberto Ballini、Gianni Giantomassi
DOI:10.1016/0040-4020(95)00133-s
日期:1995.4
Treatment of α-nitro ketone tosylhydrazones with DBU gives 1,4-elimination of nitrous acid affording 1-tosylazoalkenes which, under basic conditions (DBU), tautomerize to the more stable enone tosylhydrazones. The obtained tosylhydrazones may be used as starting material for a wide range of other functionalities. Removal of the hydrazone affords conjugated enones in good yields. Due to the possibility
Chromate Oxidation of α-Nitro Alcohols to α-Nitro Ketones: Significant Improvements to a Classic Method
作者:Tarek Elmaaty、Lyle Castle
DOI:10.3390/10121458
日期:——
A series of eight alkyl and aryl α-nitroketones were prepared by the potassium dichromate oxidation of the corresponding nitro alcohols. Short reaction times allowed for the easy isolation of pure nitro ketones that are devoid of starting materials and/or other oxidation side products.
Indirect electrooxidation of alcohols and aldehydes by using a double mediatory system consisting of ruthenium tetraoxide/ruthenium dioxide and chlorine cation/chlorine anion redoxes in an aqueous-organic two-phase system