Copper-catalyzed intermolecular asymmetric propargylic dearomatization of phenol derivatives
作者:Long Shao、Xiang-Ping Hu
DOI:10.1039/c7cc03034g
日期:——
A copper-catalyzed intermolecular asymmetric propargylic dearomatization of phenol derivatives has been realized. Under the catalysis of Cu(OTf)·1/2C6H6 decorated with a chiral tridentate ketimineP,N,N-ligand, the dearomatization reaction proceeded smoothly with excellent control of chemo-, regio-, and enantioselectivities, thus providing a variety of optically active cyclohexadienone derivatives
已经实现了铜催化的苯酚衍生物的分子间不对称炔丙基脱芳香化反应。在手性三齿酮亚胺P,N,N-配体修饰的Cu(OTf)·1 / 2C 6 H 6的催化下,脱芳香化反应顺利进行,对化学,区域和对映体的选择性得到很好的控制。多种光学活性环己二烯酮衍生物,ee最高可达99%以上。
Shifted Selectivity in Protonation Enables the Mild Deuteration of Arenes Through Catalytic Amounts of Bronsted Acids in Deuterated Methanol
作者:Oliver Fischer、Anja Hubert、Markus R. Heinrich
DOI:10.1021/acs.joc.0c01604
日期:2020.9.18
effect” of the solvent methanol, deuterations of electron-rich aromatic systems can be carried out under mild acid catalysis and thus under far milder conditions than known so far. The exceptional functional group tolerance observed under the optimized conditions, which even includes highly acid-labile groups, results from a hitherto unexploited shifted selectivity in protonation, and enabled simple
WATER-SOLUBLE TRIAZAPYRIDINOPHANE-BASED COMPLEXING AGENTS AND CORRESPONDING FLUORESCENT LANTHANIDE COMPLEXES
申请人:CISBIO BIOASSAYS
公开号:US20180362549A1
公开(公告)日:2018-12-20
The invention relates to complexing agents of formula (I)
in which A
1
, A
2
, A
3
and R
1
are as defined in the description. The invention also relates to lanthanide complexes obtained from said complexing agents.
The invention can be used for marking biological molecules.
WATER-SOLUBLE TRIMETHOXYPHENYLPYRIDINE-TYPE COMPLEXING AGENTS, AND CORRESPONDING LANTHANIDE COMPLEXES
申请人:CISBIO BIOASSAYS
公开号:US20200140413A1
公开(公告)日:2020-05-07
The invention relates to complexing agents of formula (I):
in which Ra, Chrom
1
, Chrom
2
and Chrom
3
are as defined in the description. The invention also relates to lanthanide complexes obtained from these complexing agents. The invention can be used for labelling biological molecules.
A compound represented by the following formula (I), or salt thereof exhibits excellent CRF receptor antagonism, and sufficient pharmacological activity, safety and pharmacokinetic properties as a drug.
wherein R
1
represents the formula -A
11
-A
12
; R
2
represents tetrahydrofurylmethyl, tetrahydropyranylmethyl or tetrahydropyranyl; A
11
represents a single bond, methylene or 1,2-ethylene; A
12
represents C1-6 alkyl, C3-6 cycloalkyl or C3-6 cycloalkyl having methyl; R
3
represents methoxy, cyano, cyclobutyloxymethyl, methoxymethyl or ethoxymethyl; and R
4
represents methoxy or chlorine.