A Route to Homochiral (S)-O-Methyl Mandelic Acid and Related α-Alkoxy Carboxylic Acids from Isopropylidene Glycerol
摘要:
An improved synthesis of the useful ketones 7 is described. These ketones are then further modified via a highly stereospecific reduction. to give homochiral alpha-alkoxy carboxylic acids which are useful chiral auxiliaries and intermediates.
A Synthesis of (S)-(-)-Umbelactone and Related α,β-Butenolides
作者:William Goldring、John Mann、Paul Brockbank
DOI:10.1055/s-0029-1219181
日期:2010.3
The development of an asymmetric route for the synthesis of α,β-butenolide building blocks, starting from commercially available D -mannitol, is described. The devised route was applied to a synthesis of the (S)-(-)-enantiomer of the antiviral natural product umbelactone, together with the construction of other synthetically useful lactone structures.
A simple and safe route to the D-xylone-1,4-lactone derivative 3, a key intermediate for the synthesis of the spiroketal fragment in calyculin A (1) has been explored without the use of hazardous diazomethane on a large scale.
COMPOUNDS HAVING TRPV1 ANTAGONISTIC ACTIVITY AND USES THEREOF
申请人:Kurose Noriyuki
公开号:US20130123239A1
公开(公告)日:2013-05-16
The invention relates to compounds of Formula I and pharmaceutically acceptable derivatives thereof, compositions comprising an effective amount of a compound of Formula I or a pharmaceutically acceptable derivative thereof, and methods for treating or preventing a condition such as pain, UI, an ulcer, IBD and IBS, comprising administering to an animal in need thereof an effective amount of a compound of Formula I or a pharmaceutically acceptable derivative thereof.