The fact that Friedel-Crafts acylation in bromoalkylaromatics usually proceeds para to the bromine substituent has been considered to be an anomaly. The acetylation of the isomeric bromo-m-xylenes has been carried out, and product identification has confirmed this type of orientation. However, by a consideration of partial rate factors and competitive reactions, it is shown that these results may be
Bulky P,PO ligands were designed to inhibit isomerization and reduction side reactions during the crosscoupling between sterically hindered aryl halides and alkylboronic acids. Suzuki–Miyaura cross‐couplings between di‐ortho‐substituted aryl bromides and acyclic secondary alkylboronic acids have been achieved with high yields. The method has also enabled the preparation of ortho‐alkoxy di‐ortho‐substituted
PHOSPHINE OXIDE COMPOUND, ORGANIC ELECTROLUMINESCENCE ELEMENT, PRODUCTION METHOD AND USES THEREOF
申请人:TERASHIMA Takashi
公开号:US20120256171A1
公开(公告)日:2012-10-11
A compound having a stable deposition rate suitable for forming an electron-transporting layer of an organic El element. The compound is represented by the following formula (1):
wherein in the formula (1), plural R
1
are each an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a halogen atom, or a hydrogen atom, and may be the same as or different from one another; and plural Ar are each a monovalent substituted or unsubstituted aromatic group optionally containing a hetero atom, and may be the same as or different from one another.
Described herein are compounds of Formula (I) and tautomers and pharmaceutical salts thereof, compositions and formulations containing such compounds, and methods of using and making such compounds.
Described herein are compounds of Formula (I) and tautomers and pharmaceutical salts thereof, compositions and formulations containing such compounds, and methods of using and making such compounds.