An additive-free enantioselective hydrogenation of β,β-disubstituted unsaturated carboxylicacids catalyzed by the Rh–(R,R)-f-spiroPhos complex has been developed. Under mild conditions, a wide scope of β,β-disubstituted unsaturated carboxylicacids were hydrogenated to the corresponding chiral carboxylicacids with excellent enantioselectivities (up to 99.3% ee). This methodology was also successfully
Carboxamide compounds as SRS-A antagonists, pharmaceutical compositions containing them, processes for the preparation, and intermediates useful therein
申请人:PFIZER INC.
公开号:EP0047119A1
公开(公告)日:1982-03-10
1.Carboxamide compounds of the formula
and their pharmaceutically-acceptable salts;
wherein R1 as hydrogen, alkyl having 1 to 4 carbon atoms or a group of the formula -CH2-CH2-NR3R4 wherein R3 and R4 are each alkyl having 1 to 3 carbon atoms;
R2 is alkyl having 8 to 15 carbon atoms or cyclo-alkyl having from 6 to 12 carbon atoms;
and Q is
or
wherein R5 and R6 are each hydrogen or methyl;
with the proviso that when Q is I
, the two groups attached to the
group have a trans relationship to each other, pharmaceutical compositions containing them, processes for their preparation, and intermediates useful therein. The compounds of the formula (I) are SRS-A antagonists useful in such disease states as allergic rhinitis, certain skin disorders, and allergic bronchial asthma.
A domino reaction comprising four consecutive steps based on the strategy of isomerization of allylicalcohols was developed. This base‐catalyzed protocol provided an approach for constructing polysubstituted quinolines without additional additives. A wide range of di‐ or trisubstituted γ‐aminoaryl allylicalcohols bearing alkyl or (hetero)aryl substituents were transformed to the structurally diverse