1,3-Dipolar cycloaddition of nitrile oxides to methyl 3-(p-nitrobenzoyloxy)acrylate: Methyl 3-(p-nitrobenzoyloxy)acrylate as a methyl propiolate equivalent with reverse regioselectivity
作者:Kyukwan Zong、Seung Il Shin、Dong Ju Jeon、Jung No Lee、Eung K. Ryu
DOI:10.1002/jhet.5570370112
日期:2000.1
3-Aryl-4-methoxycarbonylisoxazoles were prepared from the reaction of a variety of substituted benzonitrile oxides with methyl 3-(p-nitrobenzoyloxy)acrylate in moderate to good yields.
DFT-HSAB Prediction of Regioselectivity in 1,3-Dipolar Cycloadditions: Behavior of (4-Substituted)benzonitrile Oxides towards Methyl Propiolate
作者:Alessandro Ponti、Giorgio Molteni
DOI:10.1002/chem.200500739
日期:2006.1.23
The regioselectivity of 1,3-dipolarcycloadditions between (4-substituted)benzonitrileoxides and methyl propiolate cannot be rationalized on the basis of the electron demand of the reactants or frontier molecular-orbital theory. To this problem, we have applied a quantitative formulation of the hard-soft acid-base principle developed within the density functional theory. Global and local reactivity
Isoxazole derivatives as peroxisome proliferator-activated receptors agonists
申请人:Fukui Yoshikazu
公开号:US20070054902A1
公开(公告)日:2007-03-08
A compound of formula (I):
(wherein
R
1
-R
10
are each independently hydrogen, halogen, optionally substituted lower alkyl or the like, X
1
is —O—, —S—, —NR
11
— (wherein R
11
is hydrogen, lower alkyl or the like), —CR
12
R
13
CO—, —(CR
12
R
13
)mO—, —O(CR
12
R
13
)m- (wherein R
12
and R
13
are each independently hydrogen or lower alkyl and m is a integer between 1 and 3) or the like, X
2
is a bond, —O—, —S—, —NR
14
— (wherein R
14
is hydrogen, lower alkyl or the like, R
14
and R
6
can be taken together with the neighboring atom to form a ring) or —CR
15
R
16
— (wherein R
15
and R
16
are each independently hydrogen or lower alkyl, R
15
and R
6
or R
10
can be taken together with the neighboring carbon atom to form a ring, R
16
and R
9
can be joined together to form a bond), X
3
is COOR
17
, C(═NR
17
)NR
18
OR
19
or the like), a pharmaceutically acceptable salt or a solvate thereof.
Azole compounds represented by formula I:
wherein ring A is isoxazole and the like, R1 is a substituted or unsubstituted aryl group and the like, R2 is a hydrogen atom and the like, and R3 is a substituted or unsubstituted alkyl group and the like, and pharmaceutically acceptable salts thereof inhibit the physiological activity of lysophosphatidic acid (LPA), and are useful as for the prophylaxis or treatment of diseases in which inhibition of the physiological activity of LPA is useful for the prophylaxis or treatment thereof, such as diseases involving the LPA receptor.
Azole compounds represented by formula I:
wherein ring A is isoxazole and the like, R1 is a substituted or unsubstituted aryl group and the like, R2 is a hydrogen atom and the like, and R3 is a substituted or unsubstituted alkyl group and the like, and pharmaceutically acceptable salts thereof inhibit the physiological activity of lysophosphatidic acid (LPA), and are useful as for the prophylaxis or treatment of diseases in which inhibition of the physiological activity of LPA is useful for the prophylaxis or treatment thereof, such as diseases involving the LPA receptor.