Triflic imide-catalyzed cascade cycloaddition and Friedel–Crafts reaction of diarylvinylidenecyclopropanes with ethyl 5,5-diarylpenta-2,3,4-trienoate
作者:Wei Li、Min Shi
DOI:10.1039/b903965a
日期:——
Triflic imide-catalyzed cascade cycloaddition and FriedelâCrafts reaction of diarylvinylidenecyclopropanes with ethyl 5,5-diarylpenta-2,3,4-trienoates provided a variety of novel polycyclic ester derivatives in moderate to good yields under mild conditions.
A compound of formula (I) or stereoisomers or pharmaceutically acceptable salts thereof, and their preparation and use as pharmaceuticals
wherein U, R
1
, R
2
and R
3
are as defined herein.
Compounds of formula (I): or stereoisomers or pharmaceutically acceptable salts thereof, wherein W, R
1
, R
2
and R
3
have the meanings as indicated in the specification, are useful for treating conditions mediated by activation of the adenosine A
2A
receptor, especially inflammatory or obstructive airways diseases. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.
Compounds of formula (I)
or stereoisomers or pharmaceutically acceptable salts thereof,
wherein W, R1, R2 and R3 have the meanings as indicated in the specification, are useful for treating conditions mediated by activation of the adenosine A2A receptor, especially inflammatory or obstructive airways diseases. Pharmaceutical compositions that contain the compounds and a process for preparing the compounds are also described.
Phosphine-Mediated [3+2] Cycloaddition Reactions of Ethyl 5,5-Diarylpenta-2,3,4-trienoates with Arylmethylidenemalononitriles and <i>N</i>-Tosylimines
作者:Xiao-Yang Guan、Min Shi
DOI:10.1021/jo802489t
日期:2009.3.6
Ethyl 5,5-diaryipenta-2,3,4-trienoates were synthesized and utilized in the phosphine-mediated [3+2] cycloaddition reactions with arylmethylidenemalononitriles and N-tosylimines in the presence of tributylphosphine. These reactions provide an easy access to a variety of novel polysubstituted cyclopentenes or pyrrolidines in good to excellent yields under mild conditions.