examples of catalysis using nickel complexes have been reported. In this work, the Ni-catalyzed transformation of ortho C-H bonds utilizing chelation assistance, such as oxidative cycloaddition of aromatic amides with alkynes, has been achieved.
Novel ampiphilic derivatives of alpha-c-phenyl-n-tert-butyl nitrone
申请人:Durand Gregory
公开号:US20060120985A1
公开(公告)日:2006-06-08
Novel compounds, derivatives of α-C-phenylN-tert-butyl nitrone, a method for production and use thereof for the preparation of medicaments for the prevention or treatment of diseases related to oxidative stress.
NOVEL AMPHIPHILIC DERIVATIVES OF ALPHA-C-PHENYL-N-TERT-BUTYLNITRONE
申请人:Durand Grégory
公开号:US20090306001A1
公开(公告)日:2009-12-10
Compounds derived from α-C-phenyl-N-tert-butylnitrone, a process for the preparation thereof and use thereof for the preparation of medicaments for use in preventing or treating oxidative stress-related diseases.
Highly Efficient and Site-Selective Phosphane Modification of Proteins through Hydrazone Linkage: Development of Artificial Metalloenzymes
作者:Peter J. Deuss、Gina Popa、Catherine H. Botting、Wouter Laan、Paul C. J. Kamer
DOI:10.1002/anie.201002174
日期:——
A joint effort: A novel, highlyefficient, and selective procedure for phosphane modification of proteins is reported (see scheme). This method involves cysteine modification with a maleimide containing a hydrazide functional group and subsequent hydrazone formation with phosphane aldehydes. Mono‐ and bidentate phosphane ligands were successfully coupled to several proteins, one of which was coordinated
syntheses of N-acyl sulfoximines have been slow to evolve, and still largely rely on the use of stoichiometric amounts of activating reagents. Here we describe the direct acylation of the nitrogen atom in sulfoximines with carboxylicacids promoted by a heterocyclic catalyst featuring the B3NO2 ring system. The protocol used was found to be operationally simple and to tolerate a wide range of functional
与最近在氮酰化催化方法学发展中取得的重大进展相反,N-酰基亚磺酰亚胺的合成进展缓慢,并且仍然主要依赖于化学计量的活化剂的使用。在这里,我们描述了由具有B 3 NO 2环系统的杂环催化剂促进的磺酰亚胺中的氮原子与羧酸的直接酰化作用。使用被发现协议是操作简单并且能够耐受宽范围的官能团,家具的Ñ酰化的亚砜亚胺,收率良好。该多硼催化剂驯服了以前难以处理的氮亲核试剂,通过在同一反应罐中催化两个连续的氮酰化反应,可以短暂合成因子Xa抑制剂。