• Title/Summary/Keyword: carbonyl

Search Result 1,116, Processing Time 0.03 seconds

Efficient, Rapid and Solvent-free Cyanosilylation of Aldehydes and Ketones Catalyzed by SbCl3

  • Pourmousavi, S.A.;Salahshornia, H.
    • Bulletin of the Korean Chemical Society
    • /
    • 제32권5호
    • /
    • pp.1575-1578
    • /
    • 2011
  • Antimony trichloride (SbCl3) was demonstrated to be an effective catalyst for the cyanosilylation of a wide variety of carbonyl compounds under solvent-free conditions. The reactions proceeded smoothly at room temperature to afford the corresponding cyanosilylethers in good to excellent yields.

One-Pot Reductive Amination of Carbonyl Compounds Using Sodium Borohydride-Cellulose Sulfuric Acid

  • Alinezhad, Heshmatollah;Tollabian, Zakieh
    • Bulletin of the Korean Chemical Society
    • /
    • 제31권7호
    • /
    • pp.1927-1930
    • /
    • 2010
  • A fast, efficient, and high yielding method for the preparation of amines by reductive amination of aldehydes and ketones using sodium borohydride in the presence of cellulose sulfuric acid in EtOH and under solvent-free conditions at room temperature is described.

Cyanosilylation of Carbonyl Compounds Catalyzed by Potassium L-Aspartate

  • George, Soney C.;Kim, Sung-Soo;Kim, Ho-Sub
    • Bulletin of the Korean Chemical Society
    • /
    • 제28권12호
    • /
    • pp.2431-2434
    • /
    • 2007
  • Potassium L-aspartate has been used as a catalyst for the cyanosilylation of carbonyl compounds producing corresponding cyanohydrin trimethylsilyl ethers in excellent yield of up to 98%. Although the catalyst is chiral, the enantioselectivities observed are generally poor except for one case, α-naphthaldehyde, 89% ee.

Reductive Acetylation of Carbonyl Compounds to Acetates with Pyridine Zinc Borohydride

  • Zeynizadeh, Behzad;Setamdideh, Davood;Faraji, Fariba
    • Bulletin of the Korean Chemical Society
    • /
    • 제29권1호
    • /
    • pp.76-80
    • /
    • 2008
  • Reductive acetylation of a variety of carbonyl compounds such as aldehydes, ketones and a,b-unsaturated enals/enones was carried out efficiently with pyridine zinc borohydride, (Py)Zn(BH4)2, in a mixture of THF-EtOAc at room temperature or under reflux condition. The corresponding acetates were obtained in high to excellent yields. In addition, chemoselective reductive acetylation of aldehydes over ketones was achieved perfectly with the reagent at room temperature.

含弗素有機 Carbonyl化合物의 Knoevenagel反應에 關한 硏究 (A Study on the Knoevenagel Reaction of Fluorinated Carbonyl Compounds)

  • 김유선
    • 대한화학회지
    • /
    • 제7권1호
    • /
    • pp.85-90
    • /
    • 1963
  • The Knoevenagel reaction of fluorinated carbonyl compounds, 1,1,1-trifluoro-propanone-2-heptafluoro-butyraldehyde, 1,3-dichloro-1,1,3,3-tetrafluoro-acetone, tetradecafluoro-heptanone-4 and 2,2,2-trifluoro-acetophenone yielded fluorinated ${\beta},{\beta}$-dialkyl-${\beta}$-hydroxy acids. Dehydration of the acids do not give the olefinic acid in the case of the perfluorinated system and gave a lactone. From the consideration of electronic and steric effects a mechanismic path of the reaction via a carbanion intermediate was proposed for the reaction. Preparation of related derivatives are also described.

  • PDF

Photochemical Reactions of Some Carbonyl Compounds with N, Nv-Dimethylaniline: Formation of $\beta- and \gamma-Hydroxynmines$

  • Kim, Sung-Sik;Change, Ji-Ae;Mah, Yoon-Jung
    • Journal of Photoscience
    • /
    • 제9권1호
    • /
    • pp.5-7
    • /
    • 2002
  • Direct irradiation of carbonyl compounds such as some aldehydes, ketones and anthraquinone in N,N-dimethylamiline(DMA), without using other solvents, gave $\beta$-hydroxyamines as the major products. Irradiation of anthrone and DMA in methanol afforded ${\gamma}$-hydroxyamine. The structure of the photoproduct was confirmed by treatment with an acid to give a bicyclic compound.

  • PDF