Carbonyl compounds preparation

The a-seleno and a-sulfenyl carbonyl compounds prepared by this reaction can be converted to a,P-unsaturated carbonyl compounds (17-11). The sulfenylation reaction has also been used as a key step in a sequence for moving the position of a carbonyl group to an adjacent carbon. ... [Pg.783]

Addition of hydrogen cyanide to carbonyl compounds preparation of cyanohydrins... [Pg.217]

Addition of ammonia and its derivatives to carbonyl compounds preparation of oximes and imine derivatives (Schiff s bases)... [Pg.217]

Addition of secondary amine to carbonyl compounds preparation of enamines... [Pg.219]

Addition of alcohol to carbonyl compounds preparation of acetal and ketal... [Pg.220]

Nitro chromium carbonyl compounds, preparation and characteristics, 5, 205... [Pg.156]

Zinc-mediated pe/n-difluoroallylation of a carbonyl compound preparation of 2,2-difluoro-1-phenyl-3-buten-1-ol29... [Pg.72]

Tota and Elderfield (248) have described a general synthesis for 2,3-disubstituted and 2,3,6-trisubstituted 5-hydroxypyrazines. In this reaction an a-(bromoacetyl-amino) carbonyl compound (prepared from an a-amino carbonyl compound with... [Pg.49]

Hodgson, D. M., Boulton, L. T. Chromium- and titanium-mediated synthesis of alkenes from carbonyl compounds. Preparation ofAlkenes 1996, 81-93. [Pg.693]

Types of reactions we meet elsewhere in the book include the reduction of a,p-unsaturated carbonyl compounds prepared by the aldol or Wittig reactions. The cyclic enone 14, prepared by a Robinson annelation is reduced regio- and stereo-selectively by LiAlH4 to the allylic alcohol2 15. The reduction of acetylenic alcohols 16, prepared by addition of metallo-alkynes to aldehydes, also with LiAlH4 is -selective (chapter 15) giving the allylic alcohol3 -17. [Pg.341]

Sequential Heck reaction and hydrosilylation of carbonyl have been carried out with the Grubbs I catalyst. AUyUc alcohols can be S3mthesized via conjugated carbonyl compounds prepared from cross-metathesis in situ by reduction with j-Bu2AlH. An access to enantiomeric 2,3-dihydroxyalkanoic esters is based on cross-metathesis, dihydroxylation and methanolysis. ... [Pg.399]

When the enone required for such reactions is unstable, it can be produced in situ by amine elimination from a p-amino carbonyl compound, prepared in turn from an enolate and an imine of formaldehyde in the Mannich reaction. [Pg.970]

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