A Convenient Synthesis of Aminomethyl Ketones (α-Amino Ketones)
Several N,N-diformylaminomethyl ketones 3 were prepared by treating the respective bromomethylketone 1 with sodium diformylamide in acetonitrile at room temperature.This reaction produced from N-formylaminomethyl ketones 4 when ethanol was used as the solvent.One of the formyl groups of N,N-difomylaminomethyl ketones was selectively removed by using a catalytic amount of sodium or potassium hydroxide in alcohol to the corresponding N-formylaminomethyl ketones 4.The formyl groups of both N,N-diformyl- and N-formylaminomethyl ketones could be easily removed by either5percent hydrochloric acid in ethanol or 6N hydrochloric acid to give the corresponding aminomethyl ketone hydrochlorides 5.These reactions are general and give high yield of the products.
Facile generation of a library of 5-aryl-2-arylsulfonyl-1,3-thiazoles
Treatment of N,N-diformylaminomethyl aryl ketones with phosphorus pentasulfide/triethylamine in chloroform gives 5-arylthiazoles directly in good yield. The 5-aryl-1,3-thiazole core has been successfully functionalised at the 2-position to yield, over two
Sheldrake, Peter W.,Matteucci, Mizio,McDonald, Edward
p. 460 - 462
(2007/10/03)
A Convenient Synthesis of Primary Amines Using Sodium Diformylamide as A Modified Gabriel Reagent
Sodium diformylamide (1) was used as a convenient substitute for phthalimide in the Gabriel synthesis of primary amines.Reagent 1 undergoes smooth N-alkylation with alkyl halides or p-toluenesulfonates 2 in acetonitrile or dimethylformamide to give the corresponding N,N-diformylalkylamines 3 in good yields, except with alkylating agents which are susceptible to base-catalyzed elimination.The formyl group of 3 can be easily removed by hydrochloric acid to give the corresponding alkylamine hydrochlorides 5 or free alkylamines 4.
Yinglin, Han,Hongwen, Hu
p. 122 - 124
(2007/10/02)
A CONVENIENT PREPARATION OF AMINOMETHYL ARYL KETONES AND THEIR DERIVATIVES
A convenient preparation of N-phenacyl diformamides, N-phenacyl formamides and aminomethyl aryl ketone hydrochlorides from aryl bromomethyl ketones and sodium diformylamide was described.
Ying-lin, Han,Hong-ven, Hu
p. 5285 - 5286
(2007/10/02)
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