A simple Green approach to the synthesis of 2-amino-5-oxo-4,5-dihydropyrano[3,2-c]chromene-3-carbonitrile derivatives catalyzed by 3-hydroxypropanaminium acetate (HPAA) as a new ionic liquid
摘要:
A new ionic liquid, 3-hydroxypropanaminium acetate (HPAA) [H3N+-CH2-CH2-CH2-OH][CH3COO-], was synthesized for the first time and used as an efficient and recoverable catalyst in the synthesis of 2-amino-5-oxo-4,5-dihydropyrano[3,2-c]chromene-3-carbonitrile derivatives by condensing together 4-hydroxycoumarin, aldehydes and malononitrile at room temperature. The catalyst can be reused for four times without noticeable loss of activity.
Modulation of volumetric properties of d(+)-glucose in aqueous 3-hydroxypropylammonium acetate solutions
作者:Vickramjeet Singh、Pratap K. Chhotaray、Ramesh L. Gardas
DOI:10.1016/j.molliq.2016.04.072
日期:2016.8
the role of water in taste mechanisms, and the effect of additive on basic taste quality of solute. In this regard, apparent molar volume, apparent specific volume, apparent molar isentropiccompressibility and apparent specific isentropiccompressibility of Glu in aqueoussolutions of 3-hydroxypropylammonium acetate (3HPAAc) have been determined at 293.15 K to 318.15 and at atmospheric pressure from
A simple Green approach to the synthesis of 2-amino-5-oxo-4,5-dihydropyrano[3,2-c]chromene-3-carbonitrile derivatives catalyzed by 3-hydroxypropanaminium acetate (HPAA) as a new ionic liquid
作者:H. R. Shaterian、A. R. Oveisi
DOI:10.1007/bf03249089
日期:2011.6
A new ionic liquid, 3-hydroxypropanaminium acetate (HPAA) [H3N+-CH2-CH2-CH2-OH][CH3COO-], was synthesized for the first time and used as an efficient and recoverable catalyst in the synthesis of 2-amino-5-oxo-4,5-dihydropyrano[3,2-c]chromene-3-carbonitrile derivatives by condensing together 4-hydroxycoumarin, aldehydes and malononitrile at room temperature. The catalyst can be reused for four times without noticeable loss of activity.
Synthesis of high-density aviation fuels with methyl benzaldehyde and cyclohexanone
high-density jet fuel range tricyclic alkanes with methyl benzaldehydes and cyclohexanone which can be derived from lignocellulose. In the first step, C14 oxygenates (i.e. 2-(2-methylbenzylidene)cyclohexanone or 2-(4-methylbenzylidene)cyclohexanone) were obtained by the solvent-free aldol condensation of 2-methyl benzaldehyde (or 4-methyl benzaldehyde) and cyclohexanone. Among the investigated catalysts
开发了一种新的两步法,用于合成可以由木质纤维素衍生的甲基苯甲醛和环己酮的高密度喷气燃料系列三环烷烃。在第一步中,通过无溶剂的2-甲基苯甲醛(或4-甲基苯甲醛)和(甲基)苯甲醛缩合得到C 14含氧化合物(即2-(2-甲基苄叉基)环己酮或2-(4-甲基苄叉基)环己酮)。环己酮。在所研究的催化剂中,EAOAc离子液体(用乙醇胺和乙酸制备的可再生催化剂)显示出最高的活性和良好的稳定性。其上的C 14的高碳收率(〜85%)在温和的反应条件下(353 K,6 h)获得含氧化合物。在第二步骤中,通过在商业Pd / C催化剂上进行水相加氢脱氧(APHDO),将C 14含氧化合物选择性地转化为1-甲基十二碳氢-1 H-芴和3-甲基十二碳氢-1 H-芴。根据我们的测量,所获得的1-甲基十二烷基-1 H-芴和3-甲基十二烷基-1 H-芴具有高密度(在298 K下分别为0.99 g mL -1和0.96 g mL