Oxidative Palladium(II) Catalysis: A Highly Efficient and Chemoselective Cross-Coupling Method for Carbon−Carbon Bond Formation under Base-Free and Nitrogenous-Ligand Conditions
作者:Kyung Soo Yoo、Cheol Hwan Yoon、Kyung Woon Jung
DOI:10.1021/ja063710z
日期:2006.12.1
For instance, oxidativepalladium(II) catalysis is effective with highly substituted alkenes and cyclic alkenes, which are known to be incompatible with other known catalytic conditions. Most examined reactions progressed smoothly to completion at low temperatures and in short times. These interesting results provide mechanistic insights and utilities for a new paradigm of palladium catalytic cycles
我们在此报告了氧促进 Pd(II) 催化的通用和温和协议的开发,导致烯基和芳基硼化合物与各种烯烃的选择性交叉偶联。与大多数交叉偶联反应不同,这种新方法即使在没有碱基的情况下也能很好地工作,因此避免了不需要的同源偶联。包括二甲基菲咯啉在内的基于氮的配体增强了反应性,并提供了一种高效的立体选择性方法来克服具有挑战性的底物限制。例如,氧化钯 (II) 催化对于高度取代的烯烃和环烯烃是有效的,已知它们与其他已知的催化条件不相容。大多数检查的反应在低温和短时间内顺利完成。
The kinetic resolution of oxazinones by alcoholysis: access to orthogonally protected β-amino acids
作者:Sarah A. Cronin、Stephen J. Connon
DOI:10.1039/d1ob01306h
日期:——
The catalytic, alcoholytic kinetic resolution of oxazinones is reported. A novel, stereochemically dense cinchonaalkaloid-basedcatalyst can facilitate the highly enantiodiscriminatory (S up to 101) ring-opening of oxazinones equipped with electrophilic aryl units to generate orthogonally protected β-amino acids for the first time.
A new preparation of highly functionaized aromatic and heteroaromatic zinc and copper organometallics
作者:Tahir N. Majid、Paul Knochel
DOI:10.1016/s0040-4039(00)97635-4
日期:1990.1
Functionalized aromatic iodides possessing an ester, cyano, chloride or keto group can be converted to arylzinc iodides by reaction with zinc in DMF or DMAC. After transmetallation to the corresponding arylcopper, they react with several electrophiles such as enongs, allylic halides and benzoyl chloride to afford highly functionalized aromatic compounds. Extension to the preparation of polyfunctionalized
Alpha aryl or heteroaryl methyl beta piperidino propanoic acid compounds as ORL1-receptor antagonists
申请人:Hashizume Yoshinobu
公开号:US20050277659A1
公开(公告)日:2005-12-15
This invention provides the compounds of formula (I):
or a pharmaceutically acceptable ester of such compound, or a pharmaceutically acceptable salt thereof, wherein R
1
and R
2
independently represent a hydrogen atom or the like; R
3
represents an aryl group having from 6 to 10 ring atoms or the like; X represents an oxygen atom, or the like; Y represents an oxygen atom or the like; and n represents an integer 0, 1 or 2.
These compounds have ORL
1
-receptor antagonist activity; and therefore, are useful to treat diseases or conditions such as pain, various CNS diseases etc.
Alpha aryl or heteroaryl methyl beta piperidino propanamide compounds as orl1-receptor antagonists
申请人:Hashizume Yoshinobu
公开号:US20070197500A1
公开(公告)日:2007-08-23
This invention provides the compounds of formula (I): or a pharmaceutically acceptable ester of such compound, or a pharmaceutically acceptable salt thereof, wherein R
1
and R
2
independently represent a hydrogen atom or the like; R
3
represents a hydrogen atom, or the like; R
4
represents a hydrogen atom or the like; (formula II) represents one of the following or the like; R
5
represents an aryl group having from 6 to 10 ring atoms or the like; X represents an oxygen atom, or the like; Y represents an oxygen atom or the like and n represents an integer 0, 1 or 2. These compounds have ORL1-receptor antagonist activity; and therefore, are useful to treat diseases or conditions such as pain, various CNS diseases etc.