Cu-catalyzed <i>N</i>-3-Arylation of Hydantoins Using Diaryliodonium Salts
作者:Linn Neerbye Berntsen、Ainara Nova、David S. Wragg、Alexander H. Sandtorv
DOI:10.1021/acs.orglett.0c00642
日期:2020.4.3
A general Cu-catalyzed, regioselective method for the N-3-arylation of hydantoins is described. The protocol utilizes aryl(trimethoxyphenyl)iodonium tosylate as the arylating agent in the presence of triethylamine and a catalytic amount of a simple Cu-salt. The method is compatible with structurally diverse hydantoins and operates well with neutral aryl groups or aryl groups bearing weakly donating/withdrawing
Studies on hydantoin. Part 2. Substituent effects in 3-arylhydantoins on the formation of aryl isocyanate ions using the mass-analysed ion kinetic energy–direct analysis of daughter ions
作者:Byoung M. Kwon、Suk Choong Kim
DOI:10.1039/p29830000761
日期:——
free drift region, has been investigated by analysis of the mass-analysed ion kinetic energy (m.i.k.e.) spectrum using direct analysis of daughter ions (d.a.d.i.). Aryl isocyanate ion formation, which gives the base peaks or highly abundant ions, occurs through three pathways involving initial loss of CO, CH, and C2H2NO, respectively, and the substituenteffects on the competing metastable transitions
Thienopyrazole Derivative Having PDE7 Inhibitory Activity
申请人:Inoue Hidekazu
公开号:US20090131413A1
公开(公告)日:2009-05-21
To provide thienopyrazole derivatives inhibiting PDE 7 selectively, and therefore, enhance cellular cAMP level. Consequently, the compound is useful for treating various kinds of disease such as allergic diseases, inflammatory diseases or immunologic diseases. The compound is thienopyrazole compound represented by the following formula (I):
[wherein, especially, R
1
is a cyclohexyl, a cycloheptyl group or a tetrahydropyranyl group; R
2
is methyl; R
3
is a hydrogen atom; and R
4
is a group: —CONR
5
R
6
(in which any one of R
5
and R
6
is a hydrogen atom)].
A direct fixation of CO<sub>2</sub> for isotopic labelling of hydantoins using iodine–phosphine charge transfer complexes
作者:John-Paul J. Bow、Valentina Adami、Agostino Marasco、Gaute Grønnevik、Dean A. Rivers、Guiseppe Alvaro、Patrick J. Riss
DOI:10.1039/d2cc01754g
日期:——
Herein, we report a method for the isotopic labelling of hydantoins directly from CO2 by means of trimethyl-λ5-phosphine diiodide mediated carbonyl insertion. The method is suitable for 13C-labelling of diverse substrates and was implementated for 11C-labelling in PET-imaging facilities for the synthesis of radiotracers. Isolated yields of 90% and radiochemical yields of 89% were achieved for hydantoin
在此,我们报道了一种通过三甲基-λ 5 -二碘化膦介导的羰基插入直接从 CO 2中同位素标记乙内酰脲的方法。该方法适用于不同底物的13 C-标记,并在 PET 成像设备中用于11 C-标记,用于合成放射性示踪剂。制剂中含有乙内酰脲的候选药物在 30 分钟内实现了 90% 的分离产率和 89% 的放射化学产率,具有高摩尔活性 (>400 MBq nmol -1 )。
Thienopyrazole derivatives having PDE7 inhibitory activity
申请人:Daiichi Sankyo Company, Limited
公开号:EP2433943A1
公开(公告)日:2012-03-28
To provide thienopyrazole derivatives inhibiting PDE 7 selectively, and therefore, enhance cellular cAMP level. Consequently, the compound is useful for treating various kinds of disease such as allergic diseases, inflammatory diseases or immunologic diseases. The compound is thienopyrazole compound represented by the following formula (I):
[wherein, especially, R1 is a cyclohexyl, a cycloheptyl group or a tetrahydropyranyl group; R2 is methyl; R3 is a hydrogen atom; and R4 is a group: -CONR5R6 (in which any one of R5 and R6 is a hydrogen atom)].