73945-73-0Relevant articles and documents
Preparation method of sofosbuvir key intermediate
-
Paragraph 0036; 0037-0038, (2020/07/15)
The invention discloses a preparation method of a sofosbuvir key intermediate ((2R,3R,4R,5R)-3-(benzoyloxy)-5-chloro-4-fluoro-4-methyltetrahydrofuran-2-yl)benzoic acid methyl ester. The preparation method comprises the following steps: by using (R)-2,2-dimethyl-1,3-dioxolane-4-carboxylic acid as a starting material, performing acylating chlorination, performing a reaction with alpha-fluoropropionic acid, performing carbonyl reduction, performing hydroxyl protection, performing hydrolytic cyclization, performing hydroxymethyl protection, performing reduction, and performing chlorination to prepare the sofosbuvir key intermediate ((2R,3R,4R,5R)-3-(benzoyloxy)-5-chloro-4-fluoro-4-methyltetrahydrofuran-2-yl)benzoic acid methyl ester. The preparation scheme has a short synthetic route and a high yield, and avoids a fluorination reaction step in the synthetic process.
A route to homochiral (S)-O-methyl mandelic acid and related α-alkoxy carboxylic acids from isopropylidene glycerol
Handa,Hawes,Pryce
, p. 2837 - 2845 (2007/10/02)
An improved synthesis of the useful ketones 7 is described. These ketones are then further modified via a highly stereospecific reduction to give homochiral α-alkoxy carboxylic acids which are useful chiral auxiliaries and intermediates.
N-Acylation of Amino Acids with Glyceric Acid
Angrick, Michael,Rewicki, Dieter
, p. 377 - 384 (2007/10/02)
Several amino acid esters were N-acylated by isopropylidene-D-glyceric acid chloride.The various blocking groups were selectively removed to yield N-D-glyceroyl-amino acids which are able to intra- or intermolecular condensation. - Keywords: N-(O-Isopropy