aromatic aldehyde

aromatic aldehyde

[¦ar·ə¦mad·ik ′al·də‚hīd]
(organic chemistry)
An aromatic compound containing the CHO radical, such as benzaldehyde.
References in periodicals archive ?
ChuanJun, Synthesis, characterization, thermochromism and photochromism of aromatic aldehyde hydrazine derivatives.
To a round-bottomed flask were added dimedone (0.22 g, 2 mmol), aromatic aldehyde (lmmol), and sulfamic acid functionalized catalyst 4 (0.03 g, 0.05 mmol) sequentially.
Furfural, an aromatic aldehyde, is also a renewable resource obtained as an agricultural waste product.
The reaction proceeds by the formation of a solketal/glycerol aldehyde acetal [19, 20] type of intermediate (ix) formed by the condensation of glycerol (viii) and aromatic aldehyde (5) in presence of triacetylborate (vii), which act as a Lewis acid, is further reacted with 2-methylbenzimidazole 4(a-b), and forms 2-styryl-benzimidazole 3(a-p) by losing water molecules.
A mixture of hydrazine hydrate (1) (1 mmol), methyl acetoacetate (2) (1 mmol), substituted aromatic aldehyde (3) (1 mmol), ethylcyano acetate (4) (1 mmol), and ZnO nanoparticle (9 mol%) in water (2 mL) was magnetically stirred at room temperature (25[degrees]C) for 55-60 min.
This might be pigskin has small amount of the molecular absorption for the functional group of carbonyl, amide group, or aromatic aldehyde.
To a mixture of 2'4'-dihydroxy acetophenone (1 m mole) and substituted aromatic aldehyde (2.5 m mole), a warm solution of KOH (15%) in aqueous methanol (1:1) was added with constant stirring until to get clear solution.
Equimolar quantities of benzil and substituted aromatic aldehyde, ammonium acetate were dissolved in glacial acetic acid and refluxed for 3-5 hours.
Isolated Time Yield Entry Aldehyde Product (min) (%) (a) 1 4a 20 95 2 4b 26 96 3 4c 16 94 4 4d 20 98 5 4e 24 95 6 4f 22 89 7 4g 25 90 8 4h 15 98 9 4i 35 88 10 4j 38 86 11 4k 18 94 12 4l 32 86 Melting point ([degrees]C) Entry Found Reported Reference 1 204-205 204-206 22 2 222-224 225-227 28 3 259-261 262-264 22 4 262-264 265-267 22 5 226-228 227-229 35 6 271-273 270-272 35 7 214-216 217-219 20 8 260-262 264-266 22 9 185-187 185-186 34 10 231-233 232-234 20 11 214-216 217-219 22 12 217-219 219-221 28 Reaction conditions: dimedone (1 mmol), phthalhydrazide (1 mmol), aromatic aldehyde 4a-1 (1.1 mmol) and 20% [H.sub.4]P[Mo.sub.11][V.sub.1][O.sub.40]/K-10 (0.15 g) at 100 [degrees]C under solvent-free conditions.
A mixture of 4,5,6,7-tetra hydro-2H-indazole-3-carbohydrazide (3, 1.8 g, 1mmol) and appropriate aromatic aldehyde (1.5 mmol) was taken in 20 mL of water.
Schiff Bases of aliphatic aldehyde get readily polymerized in nature and are unstable whereas Schiff bases of aromatic aldehyde are more stable due to involvement in the conjugation system.