Provided herein are compounds of the formula (I):
as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of inflammatory diseases and disorders such as, for example, asthma and COPD.
Barbot, Francis; Miginiac, Philippe, Bulletin de la Societe Chimique de France, 1983, vol. 2, # 1-2, p. 41 - 45
作者:Barbot, Francis、Miginiac, Philippe
DOI:——
日期:——
Enzymatic resolution of the ethyl acetals of (R)- and (S)-4-hydroxyalk-2-ynals
作者:Pietro Allevi、Mario Anastasia、Francesco Cajone、Pierangela Ciuffreda、Anna M. Sanvito
DOI:10.1016/s0957-4166(00)80472-3
日期:1994.1
4-hydroxyalk-2-ynals diethylacetals have been efficiently resolved by enatioselective acetylation mediated by Pseudomonas fluorescens lipase affording the acetylated (R)-enantiomers in preference, independent of the length and bulk of the alkyl substituent at the carbinol group. Reduction with LiAlH4 of unreacted or acetylated isomers affords the corresponding ethylenic acetals with the hydrogen deriving from the hydride in the beta position in respect to the allylic hydroxyl.
BARBOT, F.;MIGINIAC, P., BULL. SOC. CHIM. FRANCE, 1983, N 1-2, 41-45