enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Benzoin condensation - Wikipedia

    en.wikipedia.org/wiki/Benzoin_condensation

    In the classic example, benzaldehyde is converted to benzoin (PhCH(OH)C(O)Ph). [3] The benzoin condensation was first reported in 1832 by Justus von Liebig and Friedrich Wöhler during their research on bitter almond oil. [4] The catalytic version of the reaction involving cyanide was developed by Nikolay Zinin in the late 1830s. [5] [6 ...

  3. Tollens' reagent - Wikipedia

    en.wikipedia.org/wiki/Tollens'_reagent

    Tollens' reagent (chemical formula ()) is a chemical reagent used to distinguish between aldehydes and ketones along with some alpha-hydroxy ketones which can tautomerize into aldehydes. The reagent consists of a solution of silver nitrate , ammonium hydroxide and some sodium hydroxide (to maintain a basic pH of the reagent solution).

  4. Dakin oxidation - Wikipedia

    en.wikipedia.org/wiki/Dakin_oxidation

    The Dakin oxidation. The Dakin oxidation (or Dakin reaction) is an organic redox reaction in which an ortho- or para-hydroxylated phenyl aldehyde (2-hydroxybenzaldehyde or 4-hydroxybenzaldehyde) or ketone reacts with hydrogen peroxide (H 2 O 2) in base to form a benzenediol and a carboxylate. Overall, the carbonyl group is oxidised, whereas the ...

  5. Benzaldehyde - Wikipedia

    en.wikipedia.org/wiki/Benzaldehyde

    Benzaldehyde (C 6 H 5 CHO) is an organic compound consisting of a benzene ring with a formyl substituent. It is among the simplest aromatic aldehydes and one of the most industrially useful. It is a colorless liquid with a characteristic almond -like odor , and is commonly used in cherry -flavored sodas . [ 5 ]

  6. Cyanohydrin reaction - Wikipedia

    en.wikipedia.org/wiki/Cyanohydrin_reaction

    Asymmetric reaction of benzaldehyde with (R)–Binol–lithium(i-propyloxy) gives (S)-acetonitrile with 98% ee The chemist Urech in 1872 was the first to synthesize cyanohydrins from ketones with alkali cyanides and acetic acid [ 2 ] and therefore this reaction also goes by the name of Urech cyanohydrin method .

  7. 2,4-Dinitrophenylhydrazine - Wikipedia

    en.wikipedia.org/wiki/2,4-Dinitrophenylhydrazine

    This reaction is, overall, a condensation reaction as two molecules joining together with loss of water. Mechanistically, it is an example of addition-elimination reaction: nucleophilic addition of the -NH 2 group to the C=O carbonyl group, followed by the elimination of a H 2 O molecule: [3] X-ray structure of DNP-derived hydrazone of ...

  8. Pomeranz–Fritsch reaction - Wikipedia

    en.wikipedia.org/wiki/Pomeranz–Fritsch_reaction

    A possible mechanism is depicted below: [5] proposed mechanism Pomeranz-Fritsch reaction. First the benzalaminoacetal 1 is built by the condensation of benzaldehyde and a 2,2-dialkoxyethylamine. After the condensation a hydrogen-atom is added to one of the alkoxy groups. Subsequently, an alcohol is removed.

  9. Bobbitt reaction - Wikipedia

    en.wikipedia.org/wiki/Bobbitt_reaction

    A possible mechanism is depicted below: [1] proposed mechanism Bobbitt reaction. First the benzaliminoacetal 3 is built by the condensation of benzaldehyde 1 and 2,2-diethylethylamine 2. After the condensation the C=N-double bond in 3 is hydrogenated to form 4. Subsequently, an ethanol is removed.