Selective functionalization at the α-methyl group of 1-substituted pyridin-2(1H)- and 4(1H)-ones (2- and 4-pyridones) can be achieved by appropriate choice of base. 发现正丁基锂可实现 1-苄基-2-和-4-吡啶酮衍生物的清洁 6(2)-甲基去质子化,而六甲基二硅肼钾 (KHMDS) 是相应 1-甲基-2 甲基去质子化的首选试剂- 和 -4-吡啶酮。去质子化在 –78 °C 下顺利进行,生成的阴离子在精确的温度控制下很容易与各种亲电子试剂(醛、酮、烷基化试剂和偶氮化合物)反应,形成有用的功能化 2- 和 4- 吡啶酮和喹嗪酮.
Tricyclic compounds having sPLA2-inhibitory activities
申请人:Shionogi & Co., Ltd.
公开号:US06673781B1
公开(公告)日:2004-01-06
The present invention provides a compound having sPLA2 inhibiting activity. The compound represented by the formula (I):
wherein R1 is (a) C1 to C20 alkyl, C2 to C20 alkenyl, C2 to C20 alkynyl, carbocyclic groups, heterocyclic groups or the like; R2 is CONH2 or CONHNH2; one of R3 and R4 is —(L2)-(acidic group) wherein L2 is a group connecting with an acid group and the length of the connecting groups 1 to 5 atoms, and the other is a hydrogen atom; its prodrug, their pharmaceutically acceptable salt, or solvate thereof.
Synthesis of 2-Substituted Pyridines via a Regiospecific Alkylation, Alkynylation, and Arylation of Pyridine <i>N</i>-Oxides
作者:Hans Andersson、Fredrik Almqvist、Roger Olsson
DOI:10.1021/ol070184n
日期:2007.3.1
Grignard reagents to pyridine N-oxides in THF at room temperature followed by treatment with acetic anhydride at 120 degrees C afforded 2-substitutedpyridines in good to high yields. Furthermore, by exchanging acetic anhydride for DMF in the second step, 2-substitutedpyridine N-oxides were obtained, as intermediates suitable for addition of a second Grignard reagent for the synthesis of 2,6-disubstituted
This invention relates to compounds of Formula (I)
1
wherein Ring A, X, Y, Z, R
1
, R
2
and R
3
are defined herein. These compounds are useful for treating and preventing cancer, inflammatory disorders, autoimmune diseases and other conditions involving PDE4 or elevated levels of cytokines. This invention also relates to pharmaceutical compositions comprising at least one compound of Formula (I) and methods for treating and preventing cancer, inflammatory disorders, autoimmune diseases and other conditions involving PDE4 or elevated levels of cytokines.
Transition-Metal-Free Regioselective Alkylation of Pyridine <i>N</i>
-Oxides Using 1,1-Diborylalkanes as Alkylating Reagents
作者:Woohyun Jo、Junghoon Kim、Seoyoung Choi、Seung Hwan Cho
DOI:10.1002/anie.201603329
日期:2016.8.8
Reported herein is an unprecedented base‐promoted deborylative alkylation of pyridine N‐oxides using 1,1‐diborylalkanes as alkyl sources. The reaction proceeds efficiently for a wide range of pyridine N‐oxides and 1,1‐diborylalkanes with excellent regioselectivity. The utility of the developed method is demonstrated by the sequential C−H arylation and methylation of pyridine N‐oxides. The reaction
[EN] QUINOLIZINONES AS INTEGRIN INHIBITORS<br/>[FR] QUINOLIZINONES INHIBITEURS DE L'INTEGRINE
申请人:IAF BIOCHEM INT
公开号:WO2000017197A1
公开(公告)日:2000-03-30
The present invention comprises novel compounds that are effective inhibitors of integrins, particularly αIIbβ3 or αv integrins such as αvβ3 and αvβ5. The present invention, according to one embodiment, comprises a compound of formula (I) or formula (II), or a pharmaceutically acceptable salt, solvate, or metabolic precursor thereof. Wherein R1, R2, R3 and R4 are as defined herein.