Alkoxylated p-phenylenevinylene oligomers: Synthesis and spectroscopic and electrochemical properties
摘要:
Twenty-one n-alkoxy substituted phenylenevinylene oligomers were synthesized, varying in size, number and position of the OR groups. IR,MS and solubility data are presented. NMR measurements provided the molecular structure as well as information about conformations and molecular dynamics. UV and of cyclic voltammetric data give correlations of chemical structure (number and position of OR substituents) with separate HOMO and LUMO energies. (C) 1997 Elsevier Science Ltd.
Electrophilic reaction of nitric oxide with Wittig reagents
作者:Zhongquan Liu、Bo Zhou、Zhongli Liu、Longmin Wu
DOI:10.1016/j.tetlet.2004.12.087
日期:2005.2
Reaction of nitric oxide (NO) with p-substituted benzyl triphenylphosphonium chlorides or bromides (Wittig reagents) in CH2Cl2 under argon undergoes electrophilic attack of NO on the carbon center of phosphonium ylides, producing benzonitriles.
The gold‐catalyzed synthesis of tetrahydrocarbazoles through dearomative [4+2] cycloadditionreactions of 3/2‐substituted 2/3‐vinylindoles with allenamides is reported. In particular, we optimized the enantioselective variant of these cycloadditions. Using allenamides as dienophiles 3‐substituted 2‐vinylindoles gave the corresponding carbazoles with high chemo‐, regio‐ and enantioselectivity. Good
Modulators of 11- beta hydroxyl steroid dehydrogenase type 1, pharmaceutical compositions thereof, and methods of using the same
申请人:Zhuo Jincong
公开号:US20070208001A1
公开(公告)日:2007-09-06
The present invention relates to inhibitors of 11-β hydroxyl steroid dehydrogenase type 1 and pharmaceutical compositions thereof. The compounds of the invention can be useful in the treatment of various diseases associated with expression or activity of 11-β hydroxyl steroid dehydrogenase type 1.
Stereoselective Rhodium-Catalyzed Isomerization of Stereoisomeric Mixtures of Arylalkenes
作者:Tao Li、Wanxiang Zhao、Hongxuan Yang、Wenke Dong、Wencan Wang
DOI:10.1055/s-0040-1707166
日期:2020.10
Abstract A new efficient method for the synthesis of a high ratio of E-alkenes from E/Z mixtures of alkenes with B2pin2 in the presence of a rhodium catalyst is described. This reaction features mild reaction conditions, broad functional group tolerance, and highly great application potential.
Six‐membered ring fused furans containing a tetrasubstituted tertiary carbon were prepared in an unprecedented one‐pot BODIPY‐catalyzed domino photooxygenation/reduction process. A series of functionalized furans was synthesized from readily available 2‐alkenylphenols and mechanistic studies were performed to account for the domino photosensitized oxygenation.