Development and Application of Organic Reagents for Analysis. VI. Synthesis and Fluorescence Spectral Properties of 2-(4-Substituted phenyl)benzofurans
Development and Application of Organic Reagents for Analysis. VI. Synthesis and Fluorescence Spectral Properties of 2-(4-Substituted phenyl)benzofurans
Heterocyclensynthesen mit MF/Al2O3-Basensystemen: 2-Arylbenzofurane and 2,3-Diarylisochinolin-1(2H)-one
作者:D. Hellwinkel、K. Göke
DOI:10.1055/s-1995-4057
日期:1995.9
Synthesis of Heterocycles with MF/Al 2 O 3 Base-Systems: 2-Arylbenzofuranes and 2,3-Diarylisoquinolin-1(2H)-ones2-Benzyloxybenzaldehydes, -acetophenones and -benzophenones substituted in the benzyl part with electron-withdrawing groups, cyclize easily to 2-arylbenzofuranes by using a standardized KF- or CsF-Al2O3 base system. An efficient one-pot synthesis for 2,3-diarylisoquinolin-1(2H)-ones is possible by reacting a variety of arene carbaldehyde anils with phthalides under the same reaction conditions.
Synthesis and Ligand Based 3D-QSAR of 2,3-Bis-benzylidenesuccinaldehyde Derivatives as New Class Potent FPTase Inhibitor, and Prediction of Active Molecules
In order to search new inhibitors against farnesyl protein transferase (FPTase), a series of 2,3-bis-benzylidenesuccinaldehyde derivatives (1-29) were synthesized and their inhibition activities ($pI_50}$) against FPTase were measured. From based on the reported results that the inhibitory activities of dimers 2,3-bis-benzylidenesuccinaldehydes were higher than those of monomers cinnamaldehydes, 3D-QSARs on FPTase inhibitory activities of the dimers (1-29) were studied quantitatively using comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) methods. The statistical qualities of the optimized CoMFA model II ($r^2_cv.}}$= 0.693 and $r^2_ncv.}}$= 0.974) was higher than those of the CoMSIA model II ($r^2_cv.}}$ = 0.484 and $r^2_ncv.}}$ = 0.928). The dependence of CoMFA models on chance correlations was evaluated with progressive scrambling analyses. And the inhibitory activity exhibited a strong correlation with steric factors of the substrate molecules. Therefore, from the results of graphical analyses on the contour maps and of predicted higher inhibitory active compounds, it is suggested that the structural distinctions and descriptors that contribute to inhibitory activities ($pI_50}$) against FPTase will be able to applied new inhibitor design.
Copper‐Catalyzed Asymmetric Diyne Cyclization via [1,2]‐Stevens‐Type Rearrangement for the Synthesis of Chiral Chromeno[3,4‐
<i>c</i>
]pyrroles
作者:Feng‐Lin Hong、Chong‐Yang Shi、Pan Hong、Tong‐Yi Zhai、Xin‐Qi Zhu、Xin Lu、Long‐Wu Ye
DOI:10.1002/anie.202115554
日期:2022.2.7
copper-catalyzed asymmetric cascade cyclization/[1,2]-Stevens-type rearrangement is disclosed, affording valuable chiral chromeno[3,4-c]pyrroles bearing a quaternary carbon stereocenter in generally moderate to good yields with excellent enantioselectivities. Importantly, this protocol represents the first catalytic asymmetric [1,2]-Stevens-type rearrangement based on alkynes and the first asymmetric formal carbene
公开了一种铜催化的不对称级联环化/[1,2]-Stevens 型重排,以通常中等至良好的产率和优异的对映选择性提供有价值的手性色烯并[3,4- c ]吡咯,其具有季碳立体中心。重要的是,该协议代表了第一个基于炔烃的催化不对称 [1,2]-史蒂文斯型重排和第一个不对称的形式卡宾插入 Si-O 键。
Deprotonation of Benzylic Ethers Using a Hindered Phosphazene Base. A Synthesis of Benzofurans from <i>Ortho</i>-Substituted Benzaldehydes
作者:George A. Kraus、Ning Zhang、John G. Verkade、Muthukaman Nagarajan、Philip B. Kisanga
DOI:10.1021/ol0000758
日期:2000.8.1
The hindered nonionic phosphazene base P(4)-t-Bu efficiently deprotonates o-arylmethoxy benzaldehydes, leading to a direct synthesis of benzofurans. Strong ionic bases such as LDA, LiTMP, and KH failed.
The present invention provides a type I insulin-like growth factor receptor (IGF-1R) inhibitor comprising, as an active ingredient, an indazole derivative represented by Formula (I):
wherein R
1
represents —NR
4
R
5
[wherein R
4
represents a hydrogen atom or the like, R
5
represents substituted or unsubstituted lower alkyl, —C(═O)R
6
(wherein R
6
represents substituted or unsubstituted lower alkyl, substituted or unsubstituted aryl or the like), or the like], or the like, and R
2
and R
3
may be the same or different and each represents a hydrogen atom, hydroxy, substituted or unsubstituted lower alkoxy, or the like} or a pharmaceutically acceptable salt thereof, and the like.