Efficient synthesis of 5′-fluoroalkoxythiazoles via α-bromo-α-fluoroalkoxyacetophenones Hantzsch type cyclization with thioureas or thioamides
摘要:
Novel alpha-fluoroalkoxyacetophenones were synthesized by addition of the readily available 2,2-dimethoxy-2-phenylethanol to fluoroolefins. alpha-Bromination yielded alpha-bromo-alpha-fluoroalkoxyacetophenones, which on treatment with thioureas or thioamides gave thiazoles with fluoroalkoxy groups at the 5'-position by the Hantzsch-type cyclization. This provides a versatile methodology for the construction of heterocycles from aliphatic fluoroalkoxy containing building blocks. (C) 2012 Elsevier B.V. All rights reserved.
DOI:
10.1016/j.jfluchem.2012.01.005
作为产物:
描述:
三氟甲磺酸 在
四磷十氧化物 作用下,
以
neat (no solvent) 为溶剂,
以66%的产率得到三氟甲烷磺酸三氟甲酯
参考文献:
名称:
由羧酸和CF3SO2OCF3的叔胺引发的酰基氟合成。
摘要:
已经开发了在室温下在合适的碱存在下用CF 3 SO 2 OCF 3将芳族和脂族羧酸脱氧氟化的简便方法。该反应可直接获得各种酰基氟,并证明CF 3 SO 2 OCF 3是一种有效的羧酸脱氧氟化剂。该方法的特点是简单,快速,高效,易于处理,对官能团的耐受性强,底物范围广,产品收率高,许多胺引发剂的相容性,使用环境友好的试剂以及轻松去除副产物。该反应代表了三氟甲基三氟甲磺酸盐首次用作氟化试剂。
The present disclosure provides phenolic compounds useful in the treatment of neurological conditions such as convulsions and tremors, having the structure of Formula (I):
wherein R
2
, R
4
, & R
5
, are as defined in the detailed description; pharmaceutical compositions comprising at least one of the compounds; and methods for treating neurological conditions.
The present invention relates to a process for the preparation of compounds containing CF
3
O groups using compounds containing at least one group Y, in which Y=—Hal, —OSO
2
(CF
2
)
z
F, —OSO
2
C
z
H
2z+1
(z=1-10), —OSO
2
F, —OSO
2
Cl, —OC(O)CF
3
— or —OSO
2
Ar, to a process for the preparation of compounds containing CF
3
O groups using KOCF
3
and/or RbOCF
3
, and to novel compounds containing CF
3
O groups, and to the use thereof.
Palladium-Catalyzed Intermolecular Ditrifluoromethoxylation of Unactivated Alkenes: CF<sub>3</sub>O-Palladation Initiated by Pd(IV)
作者:Chaohuang Chen、Yixin Luo、Liang Fu、Pinhong Chen、Yu Lan、Guosheng Liu
DOI:10.1021/jacs.7b11470
日期:2018.1.31
A novel palladium-catalyzedintermolecular ditrifluoromethoxylation of unactivatedalkenes has been developed, using a new electrophilic reagent, SelectfluorCN, as a strong oxidant, and AgOCF3 as a trifluoromethoxide source. Preliminary mechanistic studies revealed that the reaction was possibly initiated by Pd(IV) species, and an unusual cis-addition of CF3O-Pd(IV) into the double bond leads to the
[EN] DIHYDROPYRIMIDINONES FOR USE AS BACE2 INHIBITORS<br/>[FR] DIHYDROPYRIMIDINONES POUR UTILISATION EN TANT QU'INHIBITEURS DE BACE2
申请人:HOFFMANN LA ROCHE
公开号:WO2010128058A1
公开(公告)日:2010-11-11
This invention relates to dihydropyrimidinones of the formula (I), wherein X and R1 to R7 are as defined in the description and in the claims, as well as pharmaceutically acceptable salts thereof. These compounds are BACE2 inhibitors and can be used as medicaments for the treatment or prevention of diseases such as diabetes.
ALCOHOL DERIVATIVES AS KV7 POTASSIUM CHANNEL OPENERS
申请人:H. Lundbeck A/S
公开号:US20210032196A1
公开(公告)日:2021-02-04
The present invention provides novel compounds which activate the Kv7 potassium channels. Separate aspects of the invention are directed to pharmaceutical compositions comprising said compounds and uses of the compounds to treat disorders responsive to the activation of Kv7 potassium channels.