Pseudoephedrine-Directed Asymmetric α-Arylation of α-Amino Acid Derivatives
作者:Rachel C. Atkinson、Fernando Fernández-Nieto、Josep Mas Roselló、Jonathan Clayden
DOI:10.1002/anie.201502569
日期:2015.7.27
Available α‐amino acids undergo arylation at their α position in an enantioselective manner on treatment with base of N′‐aryl urea derivatives ligated to pseudoephedrine as a chiral auxiliary. In situ silylation and enolization induces diastereoselective migration of the N′‐aryl group to the α position of the amino acid, followed by ring closure to a hydantoin with concomitant explulsion of the recyclable
An iridium complex successfully catalyzed the annulation of various N-arylcarbamoyl chlorides with internal alkynes to afford 2-quinolones in good to excellent yields. The present reaction is widely applicable to substrates with various functionalities. An amide-iridacycle complex was isolated, and it is likely that such an iridacycle species is a key intermediate in the catalytic reaction.
AZETIDINONE DERIVATIVES FOR THE TREATMENT OF HCMV INFECTIONS
申请人:BOEHRINGER INGELHEIM (CANADA) LTD.
公开号:EP1021405B1
公开(公告)日:2002-09-25
IMMUNOMODULATING UREA AZALIDES
申请人:Zoetis Services LLC
公开号:US20210290591A1
公开(公告)日:2021-09-23
Defined herein are immunomodulating Formula (1) compounds wherein R, R
0
, R
1
, R
2
,
R
3
and W are as defined herein, stereoisomers thereof, and pharmaceutically acceptable salts thereof; and compositions comprising said compounds. The invention also includes methods for treating an inflammatory and/or immunological disease or disorder in an animal by administering a therapeutically effective amount of a Formula (1) compound, stereoisomer thereof, and a pharmaceutically acceptable salt thereof; or use of said compound of Formula (1) to prepare a medicament for treating an inflammatory and/or immunological disease or disorder in an animal.