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Amide From aldehyde

In the amide reduction scheme on p. 618, the step framed in green gives an iminium ion. Stopping the reaction here would therefore provide a way of making aldehydes from amides. Because these tetrahedral intermediates are rather more stable than those from ester reduction, this can often be achieved simply by carrying out the amide reduction, and quenching, at 0°C (-70 °C is usually needed to stop esters overreducing to alcohols). [Pg.621]

Aldehydes from amides. temperature with Cp2Zr(HtCl iii... [Pg.496]

Zirconocene hydrochioride. 14, 81 15, 80-81 18,416-417 19,415-416 20, 445-446 Aldehydes from amides. Tertiary amides are reduced to aldehydes at room temperature with Cp2Zr(H)Cl in THF (16 examples, 75-99%). [Pg.497]

Aldehydes from amides. Aromatic tertiary amides (1) can be converted into aryl aldehydes (3) by formation of the Vilsmeier complex (2) followed by reduction with zinc dust (equation I). ... [Pg.464]

Aldehydes may also be prepared from carboxylic acids via amide or ester intermediates. See section 51 (Aldehydes from Amides) and section 53 (Aldehydes from Esters)... [Pg.137]

See other pages where Amide From aldehyde is mentioned: [Pg.55]    [Pg.57]    [Pg.55]    [Pg.271]    [Pg.56]    [Pg.98]    [Pg.64]    [Pg.81]    [Pg.50]    [Pg.148]    [Pg.149]    [Pg.72]    [Pg.72]    [Pg.59]    [Pg.56]   
See also in sourсe #XX -- [ Pg.533 ]

See also in sourсe #XX -- [ Pg.82 ]

See also in sourсe #XX -- [ Pg.321 , Pg.327 , Pg.340 , Pg.618 ]



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Acid Amide from aldehyde

Aldehyde amidation

Aldehydes amides from, with hydroxylamine

Aldehydes from Weinreb amide reduction

Amidations aldehydes

From amides

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