摘要:
The invention is directed to a process of the oxidation of alcohols with the aid of a nitroxyl radical of the general formula (I) wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 are independent of each other (C 1 -C 8 )-alkyl, (C 1 -C 8 )-alkoxy, (C 6 -C 18 )-aryl, (C 7 -C 19 )-aralkyl, (C 6 -C 18 )-aryl-(C 1 -C 8 )-alkyl, (C 3 -C 18 )-heteroaryl, (C 4 -C 19 )-heteroaralkyl, (C 3 -C 18 )-heteroaryl-(C 1 -C 8 )-alkyl, (C 3 -C 8 )-cycloalkyl, (C 3 -C 8 )-cycloalkyl-(C 1 -C 8 )-alkyl, (C 1 -C 8 )-alkyl-(C 3 -C 8 )-cycloalkyl, or R 5 and R 6 are bonded together via a (C 1 -C 3 )-alkyl chain, which can be substituted by one or more R 1 , N[(C 1 -C 8 )-alkyl] 2 , (C 1 -C 8 )-amido, (C 1 -C 8 )-alkyloxy carboxyl, (C 6 -C 18 )-aryloxy carboxyl, nitrile, Hal, =O, part of a polymer, and a co-oxidant. Primary alcohols are oxidised preferably compared to secondary ones.
摘要:
A method for selectively oxidizing the primary hydroxyl group of an organic compound which comprises reacting a resin having an amine oxide adsorbed thereon and an electrolytically oxidized product of a halogen-containing compound with the organic compound having the primary hydroxyl group.
摘要:
Trehalose is oxidized to give oxidized trehalose which then is hydrolyzed to produce D-glucuronolactone which is thereafter recovered to realize high-yield and low-cost production of D-glucuronolactone.
摘要:
Trehalose is oxidized to give oxidized trehalose which then is hydrolyzed to produce D-glucuronolactone which is thereafter recovered to realize high-yield and low-cost production of D-glucuronolactone.
摘要:
D-psicofuranose and D-psicopyranose derivatives represented by general formulae (I) and (II), useful as the key intermediates in a novel process for producing hydantocidin; wherein R through R may be the same or different from one another and each represents hydrogen or a hydroxyl-protecting group; and X represents optionally protected hydroxymethyl, carboxyl, carbamoyl or allophanoyl.
摘要:
Les dérivés de l'acide galacturonique de formule:
R1 étant alkyle linéaire ou ramifié ayant de 8 à 22 atomes de carbone, R étant
ou
dont le carbone portant le groupe hydroxyle n'est pas relié à l'atome d'oxygène endocyclique. R2 étant l'hydrogène, un atome de métal alcalin, de métal alcalino-terreux, un groupe ammonium quaternaire de formule
dans laquelle chacun de R3 à R6 est indépendamment des autres l'hydrogène, alkyle ayant de 1 à 6 atomes de carbone, ou hydroxyalkyle ayant de 1 à 6 atomes de carbone sont des agents tensioactifs.
摘要:
A process for producing 1-fluoro-glycuronic acids which may contain protected amino groups and their salts, in which glycopyranosylfluorides of mono or oligo-saccharides with at least one primary OH function are oxidised in aqueous solution in the pH region of 6 to 9, using oxygen as the oxidising agent, in the presence of a catalyst containing at least one metal of the platinum group, the resultant 1-fluoro-glycuronic acids are at least partially neutralised. The invention also relates to compounds of general formula (I), in which M is hydrogen or a cation, especially an alkaline metal, X is oxygen or NH, mutually independently, where with X = oxygen, R is hydrogen or a glycosidically bonded monosaccharide and where with X = NH, R is an acyl, alkyl, aryl or aralkyl protective group radical with up to 10 C atoms, but where only one of the RX groups stands for anything other than OH.
wherein R¹, R², R³, R⁴, and R⁵ each independently represents hydrogen, acetyl or benzyl, R⁶ represents hydrogen, hydroxyl, acetoxy, or benzyloxy, R⁷ represents hydrogen, or R⁶ and R⁷ together represent a direct bond, and R⁸ represents carboxyl, methoxycarbonyl, hydroxymethyl, or acetoxymethyl; or a salt thereof. The compound is useful for plant culture, growth inhibition of moyashi roots, and growth promotion of moyashi hypocotyls.
摘要:
The invention relates to novel cyclopolyglycuronic acid compounds which are useful in the treatment of symptom relief in human disease including acne, blackheads and other facial lesions. More particularly the invention relates to novel pharmaceutical compositions that can be used in the form of a topical cream or ointment, in a pill or capsule format, in an injection concentrate or solution, in a composition that can be nebulized or in compositions in the form of a suppository.