1527-97-5Relevant articles and documents
The toxic aldehyde, 4-hydroxy-2-trans-nonenal (HNE) formation in natural and imitation mozzarella cheeses: Heat treatment effects
Han, In Hwa,Csallany, A. Saari
, p. 1801 - 1805 (2012)
The formation of 4-hydroxy-2-trans-nonenal (HNE), a toxic aldehyde formation, was investigated in heat treated imitation Mozzarella cheeses which are made with vegetable oils and in natural Mozzarella cheeses which contain dairy fats. The cheeses were hea
Selective reduction of carboxylic acids to aldehydes catalyzed by B(C 6F5)3
Bezier, David,Park, Sehoon,Brookhart, Maurice
supporting information, p. 496 - 499 (2013/03/29)
B(C6F5)3 efficiently catalyzes hydrosilylation of aliphatic and aromatic carboxylic acids to produce disilyl acetals under mild conditions. Catalyst loadings can be as low as 0.05 mol %, and bulky tertiary silanes are favored to give selectively the acetals. Acidic workup of the disilyl acetals results in the formation of aldehydes in good to excellent yields.
Novel synthesis, properties, and NAD+-NADH type redox ability of 1,3-dimethylcyclohepta[4,5]pyrrolo[2,3-d]pyrimidine-2,4(1,3H)-dionylium ions annulated with additional pyrrolo[2,3-d]pyrimidine-1,3(2,4H)-dione and furan analogue, and their hydride adducts
Naya, Shin-Ichi,Nishimura, Junya,Nitta, Makoto
, p. 9780 - 9788 (2007/10/03)
A convenient preparation of novel cations 11a,b+·BF 4- and 12a,b+·BF4 -, which are derived from annulation of the 1,3-dimethylcyclohepta[4, 5]pyrrolo[2,3-d]pyrimidine-2,4(1,3H)-dionylium ion with additional pyrrolo[2,3-d]pyrimidine-1,3(2,4ii)-dione and a furan analogue, was accomplished by a novel oxidative cyclization of 1,7-dihydro-7-[1′,3′-dimethyl- 2′,4′(1′,3′H)-dioxo-6′-(phenylamino) -pyrimidin-5′-yl]-1,3-dimethyl-10-phenylcyclohepta[4,5]pyrrolo[2,3-d] pyrimidine-2,4(1,3H)-dione 9 and its furan-analogue by using DDQ or photoirradiation under aerobic conditions. Structural characteristics of 11a,b+ and 12a,b+ were clarified on inspection of the UV-vis and NMR spectral data as well as X-ray crystal analyses. The stability of cations 11a,b+ and 12a,b+ is expressed by the pK R+ values that were determined spectrophotometrically to be 10.7-12.6. The electrochemical reduction of 11a,b+·BF 4 and 12a,b+·BF4- exhibited reduction potential at -0.93 to -1.00 (V vs Ag/AgNO3). The first reduction potential of 11a+ was reversible due to steric hindrance of two phenyl groups. The photoinduced oxidation reaction of 11a,b +·BF4- and 12a,b+· BF4- toward some amines under aerobic conditions was carried out to give the corresponding imines (isolated by converting to the corresponding 2,4-dinitrophenylhydrazones) with the recycling numbers of 0.6-30.3. Furthermore, as an example of the NAD+-NADH models, the reduction of a pyruvate analogue and some carbonyl compounds with the hydride-adduct of 11a+-BF4- was accomplished for the first time to give the corresponding alcohol derivatives.
