Benzaldehyde from benzamides

Anthraquinone synthesis.1 The original anthraquinone synthesis (10, 75) from benzamides and benzaldehydes involving a tandem orf/io-lithiation can be improved by use of an ort/to-bromobenzaldehyde as the second component. In this version, the second lithiation involves halogen-metal exchange, which results in higher yields. In the example cited here, the yield was only 15% in the absence of the bromine substituent on the aldehyde. 

Apart from these above mentioned compounds, courmains, iridoids, and alkaloids have also been obtained from semi-mangroves distributed in China. For example, cerbinal, p-hydroxy-benzaldehyde, benzamide, n-hexadecane acid monoglyceride, loliolide, 3-sitosterol, et al. 

Bacteriochlorins, 851 Barbituric acid metal complexes, 798 Barium alkoxides synthesis, 336 Barium complexes phthalocyanines, 863 porphyrins, 820 Becium homblei copper accumulation, 964 Benzaldehyde, 2-amino-self-condensation aza macrocycles from, 900 Benzamide, o-mercapto-metal complexes, 655 Benzamide oximes metal complexes, 274 Benzamidine, /V, V -diphenyl-metal complexes. 275 Benzene, 1,2-diamino-reactions with dicarbonyl compounds aza macrocycles from, 902 Benzene, 4 methylthionitroso-metal complexes, 804 Benzenedithiolates metal complexes, 605... 

Dimethylcherylline, dimethylether of alkaloid cherylline, has been prepared (15% total yield) from the appropriately substituted /V-methyI benzamide, via condensation with the corresponding benzaldehyde and subsequent cyclization.137,152... 

In DMF, benzaldehyde benzoylhydrazone (XXII) is reduced to a mixture of the anion of XXII (from XXII by deprotonation by EGB), benzamide and benzaldehyde, the latter formed from benzylideneimine. The cleavage of the N-N bond occurs after the uptake of... 

Activation by rhodium complexes has been used to achieve direct exchange of ketone methyl or aryl groups with an aryl group on ArB(OH)2, selective C(CO)-C bond cleavage on reaction of ketones with water, oxidative acylation between secondary benzamides and aryl aldehydes with subsequent intramolecular cyclization to 3-hydroxyisoindolin-l-ones, " cross dehydrogenative coupling to form xanthones from 2-aryloxybenzaldehydes, and activation of the aldehydic C-H bond to achieve hydroacylation of unactivated alkenes by salicylaldehyde derivatives and of vinylsilane by benzaldehyde. ... 

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