An efficient green chemistry approach to the synthesis of β-aminoketones was developed under combined microwave and ultrasound irradiation. With this technique, the title compounds were rapidly synthesized in aqueous media with good yields.
Synthesen 3-arylsubstituierter Phenole aus (3-Aryl-3-oxopropyl)-dialkylammoniumchloriden und 1-(2-Oxopropyl)pyridiniumchlorid
作者:Karl Eichinger、Peter Nussbaumer
DOI:10.1055/s-1991-26540
日期:——
Syntheses of 3-Arylphenols from (3-Aryl-3-oxopropyl)dialkylammonium Chlorides and 1-(2-Oxopropyl)pyridinium Chloride The reactions of (3-aryl-3-oxopropyl)dialkylammonium chlorides 1a-f with 1-(2-oxopropyl)pyridinium chloride (2) and triethylamine gave the 3-arylphenols 3a-f with yields from 43 to 83%.
Reaction of 4,5-diamino-3-methyl-1-phenylpyrazole with 3-dimethylaminopropiophenones. Synthesis of new 4-aryl-6-methyl-8-phenyl-2,3-dihydropyrazolo[3,4-<i>b</i>]diazepines and 4-aryl-8-methyl-6-phenyl-2,3-dihydropyrazolo[4,3-<i>b</i>]diazepines
New4-Aryl-6-methyl-8-phenyl-2,3-dihydropyrazolo[3,4-b]diazepines and 4-aryl-8-methyl-6-phenyl-2,3-dihydropyrazolo[4,3-b]diazepines were obtained from the reaction of 4,5-diamino-3-methyl-1-phenylpyrazole 1 with one equivalent of the 3-dimethylaminopropiophenones 2 in absolute ethanol. The structures of 4-aryl-6-methyl-8-phenyl-2,3-dihydropyrazolo[3,4-b]diazepines 3 and 4-aryl-8-methyl-6-phenyl-2,3-dihydropyrazolo[4
新的4-芳基-6-甲基-8-苯基-2,3-二氢吡唑并[3,4- b ]二氮杂和4-芳基-8-甲基-6-苯基-2,3-二氢吡唑并[4,3- b由4,5-二氨基-3-甲基-1-苯基吡唑1与一当量的3-二甲基氨基苯乙酮2在无水乙醇中的反应获得二氮杂pine 。4-芳基-6-甲基-8-苯基-2,3-二氢吡唑并[3,4- b ]二氮杂3和4-芳基-8-甲基-6-苯基-2,3-二氢吡唑并[4,通过详细的NMR测量确定3- b ]二氮杂卓4。
Synthesis of new 6-Aroylpyrido[2,3-<i>d</i>]pyrimidines
The synthesis of 6-dimethylaminomethylenaminopyrimidin-4(3H)-ones 2 and its reaction with β-dimethyl-aminopropiophenone hydrochloride 3 is discussed in this work. The reaction of 6-aminopyrimidin-4(3H)-ones 1 with an excess of dimethylformamide dimethyl acetal gives rise to the formation of 6-dimethylaminomethyleneaminopyrimidines 2. The heating of equimolecular quantities of 2 and 3 in dimethylformamide
在这项工作中讨论了6-二甲基氨基亚甲基氨基嘧啶-4(3 H)-ones 2的合成及其与β-二甲基氨基苯乙酮盐酸盐3的反应。6-氨基嘧啶-4(3 H)-ones 1与过量的二甲基甲酰胺二甲基乙缩醛反应生成6-二甲基氨基亚甲基氨基嘧啶2。等摩尔量的2和3在二甲基甲酰胺中的加热导致6-芳酰基吡啶基[2,3- d ]嘧啶衍生物4。化合物2和4的结构是根据核磁共振测量确定的。
Synthesis of 4-aryl-2,3,6,7-tetrahydro-1<i>H</i>-pyrimido[4,5-<i>b</i>][1,4]-diazepin-6-ones from 4,5-diamino-1<i>H</i>-pyrimidin-6-ones and 1-aryl-3-(dimethylamino)-1-propanones
The reaction of 1-aryl-3-(dimethylamino)-1-propanones 1 with one equivalent of 4,5-diamino-1H-pyrimidin-6-ones 2, in acidic medium, leads to the formation of 4-aryl-2,3,6,7-tetrahydro-1H-pyrimido[4,5-b]-[1,4]diazepin-6-ones 3. The structure elucidation of the products is based on detail nmr analysis of experiments such as 13C, 1H and DEPT including selective 13C1H} decoupling experiments.
1-芳基-3-(二甲基氨基)-1-丙烷1与一当量的4,5-二氨基-1 H-嘧啶-6-酮2在酸性介质中的反应导致形成4-芳基- 2,3,6,7-四氢-1 H-嘧啶基[4,5- b ]-[1,4]二氮杂-6-1-酮3。产物的结构阐明是基于对13 C,1 H和DEPT等实验的详细nmr分析,其中包括选择性13 C 1 H}解耦实验。