Pivalaldehyde → Retinal

HRID 1534274Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1534274
[CH3:1][C:2]([CH3:6])([CH3:5])[CH:3]=O.C[C:8]([CH3:13])([CH2:11][CH3:12])[CH:9]=O.[CH2:14]([C:16]([CH3:21])([CH2:19][CH3:20])C=O)[CH3:15].[CH3:22][C:23](C)([CH2:26][CH:27]=C)C=O.CC(C)(CCC)C=[O:33].CC(C)(C=C=C)C=O>>[CH3:22][C:23]1[CH2:26][CH2:27][CH2:3][C:2]([CH3:6])([CH3:5])[C:1]=1/[CH:12]=[CH:11]/[C:8](/[CH3:13])=[CH:9]/[CH:20]=[CH:19]/[C:16](/[CH3:21])=[CH:14]/[CH:15]=[O:33]

Komponenten

7

Edukt 6

HCID 12417Pivalaldehyde2×HCID 776782,2-Dimethyl-3,4-pentadienalHCID 796362,2-Dimethylpent-4-enal2×HCID 842922,2-DimethylvaleraldehydeHCID 137426Butanal, 2,2-dimethyl-HCID 15174357HCID 15174357, Verbindung

Produkt 1

HCID 638015Retinal

Versuchsvorschrift

Examples of the aldehyde of the general formula (1) include trimethylacetaldehyde, 2,2-dimethylbutanal, 2-ethyl-2-methylbutanal, 2,2-dimethyl-4-pentenal, 2,2-dimethylpentanal, 2,2-dimethylpenta-3,4-dienal and the like. Particularly, trimethylacetaldehyde (boiling point 74° C. at 730 mmHg) and 2,2-dimethy-4-pentenal (boiling point 124° C. at 760 mmHg) are preferable examples of the invention because the both substances themselves and the corresponding alcohols formed at the preparation of vitamin A aldehyde as side products have lower boiling points, so that these materials can be easily removed from the reaction mixtures at lower temperatures after the completion of the reaction.

Quellen und Nachweise

ORD-Eintrag
ord-9dce8744d086419194eb3e2a210df7f1
Quelldatensatz
uspto-grants-1992_02
Patentnummer
US05087762

Notizen zur Reaktion

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