Iodine-Catalyzed Regioselective Sulfenylation of 4H-Pyrido[1,2-a]pyrimidin-4-ones with Sulfonyl Hydrazides
作者:Shaohua Wang、Wenjie Liu、Zhihao Cai、Ziying Li、Jianwen Liu、Anda Wang
DOI:10.1055/s-0036-1588549
日期:2018.1
A simple and efficient method for direct sulfenylation of 4H-pyrido[1,2-a]pyrimidin-4-ones with sulfonyl hydrazides has been developed. The transformation is catalyzed by iodine under metal-free conditions with high regioselectivity and good functional-group tolerance.
Synthesis of Fused Pyrimidinone and Quinolone Derivatives in an Automated High-Temperature and High-Pressure Flow Reactor
作者:Jennifer Tsoung、Andrew R. Bogdan、Stanislaw Kantor、Ying Wang、Manwika Charaschanya、Stevan W. Djuric
DOI:10.1021/acs.joc.6b02520
日期:2017.1.20
pyrimidinone and quinolone derivatives that are of potential interest to pharmaceutical research were synthesized within minutes in up to 96% yield in an automated Phoenix high-temperature and high-pressure continuous flow reactor. Heterocyclic scaffolds that are either hard to synthesize or require multisteps are readily accessible using a common set of reaction conditions. The use of low-boiling solvents
Regioselective C3 Alkenylation of 4 <i>H</i>-pyrido[1,2-<i>a</i>]pyrimidin-4-ones via Palladium-Catalyzed CH Activation
作者:Wenjie Liu、Shaohua Wang、Qi Zhang、Jingwen Yu、Jiahe Li、Zhiwei Xie、Hua Cao
DOI:10.1002/asia.201402455
日期:2014.9
A general and efficient palladium‐catalyzed direct C3alkenylation of 4H‐pyrido[1,2‐a]pyrimidin‐4‐ones using AgOAc/O2 as the oxidant has been developed. A variety of 4H‐pyrido[1,2‐a]pyrimidin‐4‐ones were successfully coupled with acrylate esters, styrenes, methylvinylketone, and acrylamide in moderate to excellent yields. The reaction exhibited complete regio‐ and stereoselectivity. This transformation
已经开发了一种以AgOAc / O 2为氧化剂的4 H-吡啶并[1,2 - a ]嘧啶-4-酮的普通钯催化的直接C3烯基化反应。各种4 H-吡啶并[1,2 - a ]嘧啶-4-酮已成功与丙烯酸酯,苯乙烯,甲基乙烯基酮和丙烯酰胺偶联,产率中等至优异。该反应显示出完全的区域选择性和立体选择性。该转化提供了一种有吸引力的新方法,可对4个H-吡啶并[1,2- a ]嘧啶-4-酮进行功能化。
NEUROLOGICALLY ACTIVE COMPOUNDS
申请人:Barnham Kevin Jeffrey
公开号:US20100160346A1
公开(公告)日:2010-06-24
The present invention relates to neurologically-active compounds, processes for their preparation and their use as pharmaceutical or veterinary agents, in particular for the treatment of neurological conditions, more specifically neurodegenerative conditions such as Alzheimer's disease.
Provided are a compound represented by general formula (I), or the pharmaceutically acceptable salt thereof,
(wherein R
a
represents a hydrogen atom or the like, R
1
and R
2
may be the same or different, and each represents a hydrogen atom, optionally substituted lower alkyl or cycloalkyl, or R
1
and R
2
are combined together with the adjacent nitrogen atom thereto to form nitrogen-containing heterocyclic group, and Z represents a bicyclic heterocyclic group in which optionally substituted two six-membered rings are fused to each other, or the like) and the like.