Biotransformation of benzaldehyde to L-phenylacetylcarbinol (L-PAC) as a key intermediate for L-ephedrine synthesis has been evaluated using pyruvate decarboxylase (PDC) partially purified from Candida utilis. PDC activity was enhanced by controlled fermentative metabolism and pulse feeding of glucose prior to the enzyme purification. With partially purified PDC, several enzymatic reactions occ...

In the title compound, C(14)H(13)NO, the dihedral angle between the aromatic rings is 49.64 (18)°. The crystal structure is stabilized by N-H⋯O, C-H⋯O and C-H⋯π hydrogen bonds.

Benzaldehyde is one of the industrially most useful feedstocks, and its transformation to high-value chemicals very attractive. Different transformations benzaldehyde, such as acetalization, pinacol coupling, hydrogenation, have been achieved herein by adjusting pH, light source, selection a catalyst. Consequently, corresponding products obtained with excellent yields (e.g. 92% yield for 96% 85...

The mol-ecule of the title compound, [Sb(C(6)H(5))(3)(C(7)H(6)NO(2))(2)], is located on a twofold axis defined by the metal center and two C atoms of a coordinated phenyl group. The Sb center has a slightly distorted trigonal-bipyramidal geometry, with the axial positions occupied by the O atoms of symmetry-related 2-hydroxy-benzaldehyde oximate ligands. An intra-molecular O-H⋯N inter-action is...

Reaction of benzaldehyde with ethyl cyanoformate in the presence of Lewis acidic Ti(IV) complexes of bispyridylamide or salen ligands and Lewis basic amines affords the O-alkoxycarbonylated cyanohydrin. In the presence of the salen-based catalytic system, acetyl cyanide can also be added to benzaldehyde, providing a highly enantioselective direct route to the O-acetylated cyanohydrin.

The cyanoglycoside, prunasin, was isolated for the first time as an aroma precursor of benzaldehyde from fresh tea leaves (Camellia sinensis var. sinensis cv. Yabukita). Prunasin was readily hydrolyzed by a crude enzyme prepared from the fresh tea leaves to liberate benzaldehyde. The isomerization of prunasin under neutral conditions was also recognized.

Tetrahydro-4H-chromene-3-carbonitrile derivatives 4a-c where prepared from the reaction of 1,4-cyclohexane dione (1), malononitrile (2) and either benzaldehyde (3a), 2-chlorobenzaldehyde (3b) or 4-methoxybenzaldehyde (3c) in ethanol containing triethylamine. Compound 4b was used to prepare pyrazole, pyrimidine thiazole derivatives. Moreover, tetrahydrobenzo[d]thiazole derivative 18 (1) with ele...