4- Acetyl-2-amino

D-fMO MO-Nonitol, 2,6-anhydro-3,S,7-trideoxy-l-C-([hydroxy-(tetrahydro-2-methoxy-5,6-dimethyl-4-methylene-2 H-pyran-2-yl) acetyl] amino)-5,5-di methyl-1, S,9-tri-0-rriethyl-, 2R-[2( j(,2[S (5-q], 5P,6P] -... 

R) -3- [(2-Ammo-4-thia2olyl)(methoxyimino)-acetyl]amino -2-oxo-l-a2etidine-sulfomc acid [78612-61-0]... 

Plant stmctural material is the polysaccharide cellulose, which is a linear P (1 — 4) linked polymer. Some stmctural polysaccharides iacorporate nitrogen iato thek molecular stmcture an example is chitin, the material which comprises the hard exoskeletons of kisects and cmstaceans. Chitki is a cellulose derivative whereki the OH at C-2 is replaced by an acetylated amino group (—NHCOCH ). Microbial polysaccharides, of which the capsular or extracellular (exopolysaccharides) are probably the most important class, show more diversity both ki monomer units and the nature of thek linkages. 

A methyl group at C-16 hinders addition to the double bond and the reaction then proceeds normally and in good yield to the 16-methyl-17-acetyl-amino steroid, which gives the 16j9-methyl-17-ketone on hydrolysis. 

Derivatives of nalidixic acid (69a-69d), containing an amino or acetyl-amino substituent at position 7 and an alkyl group at N-1, were successfully nitrated to give (70a-70d). However, in all cases hydrolysis of the amino and acetylamino group was observed (79YZ155 80CPB235). 

A rather more complex amino alcohol side chain is accessible by a variation of the Mannich reaction. Taking advantage of the acidic proton in acetylenes, propargyl acetate (62) is condensed with formaldehyde and dimethylamine to give the acetylated amino... 

Chemical Name 6-<[amino-(4-hydroxyphenyl)acetyl] amino)-3,3-dimethyl-7-oxo-4-thia-1 a2abicyclo[3.2.0] heptane-2-carboxylic acid... 

Chemical Name 7-[ [Amino-(4-hydroxyphenyl)acetyl] amino] -3-methyl-8oxo-5-thia-1 -aza-bicyclo [4.2,0] oct-2-ene-2-carboxylic acid monohydrate... 

Chemical Name 3-[(acetyloxy)methyl] -8-oxo-7-<[(4-pyridinylthio)acetyl] amino>-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid monosodium salt... 

Preparation of a-Acety/amino-0-(5-Benzy/oxy-/ndo/yl-3)-Propionic Acid 15 grams a-acetyl-amino-0 -carboxy-/3-(5-benzyloxy-indolyl-3)-propionic acid was suspended in 225 ml water and the suspension refluxed and stirred in a stream of nitrogen until evolution of carbon dioxide ceased (about 2 hours). After cooling somewhat, 120 ml ethyl alcohol was added and the suspension refluxed until the product dissolved. Charcoal was added to the solution the mixture filtered hot, and the filter-cake washed with 50 ml hot 50% aqueous ethanol. 0 -Acetylamlno-/3-(5-benzyloxy-indolyl-3)-propionic acid, MP 164° to 166°C, which crystallized from the filtrate on cooling, was collected, washed with an ice-cold mixture of 15 ml ethanol and 45 ml water, and dried in vacuo over silica gel (yield 11.1 grams, 83%). 

Chemical Name 3,3-Dlmethyl-7-oxo-6- [ [ (2-propenylthio)acetyll amino] -4-thia-1 -azabi-cycio[3.2.0] -heptane-2[Pg.1178]

Benzyloxyindolyl-3) -Oi-acetyl-amino-Ct-methylthiopropionic acid methanethiol ester Oxitriptan... 

D, L-N-acetyl amino acid L-amino acid D-N-acatyl amino acid... 

The flow diagram of the enzyme reactor for continuous production of the L-amino add is given in Figure A85. The acetyl amino add is continuously charged into the enzyme column through a filter and a heat exchanger. The effluent is concentrated and the L-amino add is crystallised. The acyl-D-amino add contained in the mother liquor is racemised by heating in a racemisation tank, and reused. 

Tylenol paracetamol N-acetyl-para-aminophenol para-acetyl-amino-phenol... 

A further thirty years were to pass before Kuhn and his co-workers (3) successfully repeated Tswetf s original work and separated lutein and xanthine from a plant extract. Nevertheless, despite the success of Kuhn et al and the validation of Tswett s experiments, the new technique attracted little interest and progress continued to be slow and desultory. In 1941 Martin and Synge (4) introduced liquid-liquid chromatography by supporting the stationary phase, in this case water, on silica in the form of a packed bed and used it to separate some acetyl amino acids. 

CN (6/f-/rani)-7-[[(2-amino-4-thiazolyl)acetyl]amino]-3-[[[ 1 -[2-(dimethylamino)ethyl]-1 //-tetrazol-5-... 

CN 3-[[[[3-(acetylmethylamino)-2,4,6-triiodo-5-[(methylamino)carbonyl]benzoyl]amino]acetyl]amino]-5-[[(2-hydroxyethyl)amino]carbonyl]-2,4,6-triiodobenzoic acid... 

RN 3686-58-6 MF C15H22N2O3 MW 278.35 EINECS 222-976-9 CN 2-[[(diethylamino)acetyl]amino]-3-methylbenzoic acid methyl ester... 

---