Novel piperidine compouds and drugs containing the same
申请人:——
公开号:US20030220368A1
公开(公告)日:2003-11-27
The present invention provides a novel compound having a superior Na
+
channel inhibition activity. Namely, it provides a compound represented by the following formula (I), a salt thereof or a hydrate of them.
1
In the formula, the ring A represents a ring represented by the formula:
2
(wherein R
1
represents a hydrogen atom etc.; and R
2
represents indicates a hydrogen atom and the like) etc.; W represents an optionally substituted C
1-6
alkylene group etc.; Z represents an optionally substituted C
6-14
aromatic hydrocarbon cyclic group etc.; and l represents an integer from 0 to 6.
作者:Qiang-Qiang Li、Zaher Shah、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.joc.7b02720
日期:2018.1.5
A base-promoted transition metal-free approach to substituted alkenes using alcohols under aerobic conditions using air as the inexpensive and clean oxidant is described. Aldehydes are relatively difficult to handle compared to corresponding alcohols due to their volatility and penchant to polymerize and autoxidize. Wittig ylides are easily oxidized to aldehydes and consequently form homo-olefination
SECOND-ORDER NONLINEAR OPTICAL COMPOUND AND NONLINEAR OPTICAL ELEMENT COMPRISING THE SAME
申请人:Otomo Akira
公开号:US20120172599A1
公开(公告)日:2012-07-05
Problem to Be Solved: to provide a chromophore having a far superior nonlinear optical activity to conventional chromophores and to provide a nonlinear optical element comprising said chromophore.
Solution: a chromophore comprising a donor structure D, a π-conjugated bridge structure B, and an acceptor structure A, the donor structure D comprising an aryl group substituted with a substituted oxy group; and a nonlinear optical element comprising said chromophore.
were formed. Stilbene derivatives also gave two regioisomers under the same reaction conditions. However, 1-methoxy-4-(4-nitrostyryl)benzene provided a single cycloaddition product. The observed regioselectivity was discussed in terms of atomic charge distribution on the olefinic double bond carbon atoms. Furthermore, activation barriers for transition states were calculated.
Diastereocontrolled synthesis of optically pure functionalized heterohelicenes
作者:Kazuhiko Tanaka、Hideji Osuga、Hitomi Suzuki
DOI:10.1016/s0957-4166(00)80425-5
日期:1993.8
preparation of functionalized opticallypureheterohelicenes. The diastereoselectivities in the synthesis of the helicenes via photocyclization were controlled by the use of these chiral auxiliaries and the resulting diastereomers were readily separated by column chromatography. Removal of the chiral auxiliaries gave opticallypure (+)-(P)- and (−)-(M)-[7]heterohelicenes, whose rotational values were