The present invention is to provide novel tricyclic compounds having leukotriene antagonistic action and represented by the formula:
1
wherein R
1
represents a halogen atom, etc., R
2
represents a nitro group, etc., A represents a 5-membered or a 6-membered heteroaromatic ring group containing 1 to 3 hetero atoms selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, etc., B represents a formula: —OCH
2
—, etc., X represents a sulfur atom, etc., Y represents C
1
-C
10
alkylene group which may have a halogen atom, etc. as a substituent(s), Z represents a carboxyl group whic may be protected, etc.,
represents a single bond or a double bond,
m is an integer of 1 to 4, n is an integer of 1 to 3, or a pharmaceutically acceptable salt thereof.
Silver-Promoted Versatile Cross-Dehydrogenative Coupling of Quinaldine with Usual Ethers
作者:Shoufeng Wang、Yafei Fan、Huaiqing Zhao、Jianfeng Wang、Shuxiang Zhang、Wengui Wang
DOI:10.1055/s-0039-1690697
日期:2019.11
great meaning and full of challenges, especially the use of inert ether molecules, such as THF as starting materials. A versatile and easily handled cross-dehydrogenative coupling between ethers and quinaldine is reported here. Compared to the developed reaction, Selectfluor is used as a mild oxidant, and a variety of functional groups are tolerated. Nitrogen protection, anhydrous systems, and external
作者:Shoufeng Wang、Shuya Xing、Yingying Zhang、Yafei Fan、Huaiqing Zhao、Jianfeng Wang、Shuxiang Zhang、Wengui Wang
DOI:10.1039/c9ra09954a
日期:——
We herein report the functionalization of α-C–H in alcohols through cross-dehydrogenative coupling reactions.
我们在此报告了通过交叉脱氢偶联反应在醇中的α-C-H上进行的官能化。
TRICYCLIC COMPOUNDS
申请人:Ube Industries, Ltd.
公开号:EP1254897A1
公开(公告)日:2002-11-06
The present invention is to provide novel tricyclic compounds having leukotriene antagonistic action and represented by the formula:
wherein R1 represents a halogen atom, etc., R2 represents a nitro group, etc., A represents a 5-membered or a 6-membered heteroaromatic ring group containing 1 to 3 hetero atoms selected from the group consisting of a nitrogen atom, an oxygen atom and a sulfur atom, etc., B represents a formula: -OCH2-, etc., X represents a sulfur atom, etc., Y represents C1-C10 alkylene group which may have a halogen atom, etc. as a substituent(s), Z represents a carboxyl group whic may be protected, etc., ------ represents a single bond or a double bond,
m is an integer of 1 to 4, n is an integer of 1 to 3,
or a pharmaceutically acceptable salt thereof.
Discovery and efficient synthesis of a biologically active alkaloid inspired by thiostrepton biosynthesis
作者:Qingfei Zheng、Shoufeng Wang、Wen Liu
DOI:10.1016/j.tet.2014.06.076
日期:2014.10
numerous biological activities, including anti-bacterial, anti-tumor, and anti-plasmodial activities. The quinaldic acid (QA) moiety-containing side ring (loop 2) was proven to play an important role in carrying out these functions. Previously, we proposed biosynthetic logic for thiostrepton loop 2 and demonstrated the formation mechanism of QA. Herein, we report the discovery and efficient synthesis of