From propionic acid and thionyl chloride propionyl chloride can be obtained, which reacts with ethanolamine in the presence of an acid scavenger ( for example pyridine ) to N-propionyl-2-aminoethanol.
42.
When heated, aspergillomarasmine A decomposes between 225?and 236 �C . Hydrolysis produces L-aspartic acid and racemic 2, 3-diamino-propionic acid . [ ? ] 20?D at pH 7 is-48?
43.
For example N-( 2-hydroxyethyl ) propionamide is first formed from propionic acid and ethanolamine in 74 % yield which can be dehydrated to give 2-ethyl-2-oxazoline in about 75 % yield.
44.
It was derived from propionic acid by the research arm of Boots UK during the 1960s, a period which also included the discovery of ibuprofen, indometacin, diclofenac, naproxen, ketoprofen, and sulindac.
45.
Members of the genus " Propionibacterium " are widely used in the production of vitamin B 12, tetrapyrrole compounds, and propionic acid, as well as in the probiotics and cheese industries.
46.
The major alternative route by which the propionyl-CoA is metabolized is based on its conversion to acrylyl-CoA . After that, it is converted to 3-hydroxy propionic acid and finally to malonic semi-aldehyde.
47.
When ethyl propionate with an oxygen-18-labeled ethoxy group is treated with sodium hydroxide ( NaOH ), the oxygen-18 label is completely absent from propionic acid and is found exclusively in the ethanol.
48.
Propionic acid is produced biologically as its coenzyme A ester, propionyl-CoA, from the sweat glands of humans, and their activity is partially responsible for the odor of both Swiss cheese and sweat.
49.
The similarity in chemical structures between propionic acid and acetic acid, which is a colorless liquid that would share many physical characteristics such as odor, may account for foot odors identified as being vinegar-like.
50.
At this stage the number of isomers in the mixture was reduced by HPLC to just two with the racemic propionic acid ester group at C13 ( ring C ) remaining in "'65 " '.
