CUR has been widely investigated as an important role in the pharmacological activities because of its low toxicity, low adverse reactions, and special structure (hydroxyl groups of the benzene rings, the double bonds in the alkene part, and the diketone
"The two major diketone
plants--which is the raw material of intermediates of yellow pigments (AAOA, AAA and AAOT) have stopped due to exploration and environmental issues.
A mixture of the dialdehyde 1 (1 mmol) and the diketone
2 (1mmol) was dissolved in a KOH solution (10%, 75 mL) in MeOH-[H.sub.2]O (3 : 1) and the mixture was stirred at room temperature.
Because diacetyl and 2,3-pentanedione, both diketones
, are chemically very similar, Morgan suspected that inhaled 2,3-pentanedione may be toxic to the respiratory tract as well.
pyrone type, chromene, diketone
, or quinone groups) and delocalised [pi]-electrons of the basal planes are assumed to have a basic nature (Contescu et al.
2-Bromo-benzaldelhyde was reacted with diketone
8 to form an imidazole.
The switch between diphenol (or hydroquinone) and diketone
(or quinone) occurs easily through oxidation and reduction reactions.
1 dietary fibre 2 dead reckoning 3 cold turkey 4 needle in a haystack 5 second thoughts 6 bogeyman 7 hang-up 8 doesn't add up 9 double helix 10 miscarriage of justice 11 accessories 12 break in 13 jump the gun 14 helpless 15 beef jerky 16 chicken wire 17 go at it tooth and nail 18 drop in the ocean 19 chromatic scale 20 diketone
21 butcher 22 just in time 23 childbearing 24 stick 25 press charges 26 down under 27 biophysics 28 make a fool of 29 audio frequency 30 battering ram 31 chairperson 32 laughing stock 33 split second 34 beta decay 35 wee hours of the morning 36 naked as a jaybird
Another component identified from the Singha extract was a substituted diketone
. This material typically is found in flavor and fragrance essences.
Greg Casey, of Anheuser-Busch's corporate research and development, used Cadoe to determine the influence of wort amino acid levels on vicinal diketone
(VDK) production in lager fermentations.
Accordingly, in presence of acetic acid, indole adds to diketone
ester A to form indolylcarbinols 3 through the Friedel-Crafts reaction.
employed a tandem [C.sub.8f]-[C.sub.1] and [C.sub.1]-[N.sub.2] bond- forming process with azidoacrylate 11 and asymmetric diazo diketone
12 (Scheme 4) to obtain a 1: 1 ratio of 7-fluoroisoquinoline isomers 13a and 13b in good yield .