A Highly Effective Cobalt Catalyst for Olefin Aziridination with Azides: Hydrogen Bonding Guided Catalyst Design
摘要:
[Co(P1)], which was designed on the basis of potential hydrogen-bonding interactions in the metal-nitrene intermediate, is a highly active aziridination catalyst with azides. [Co(P1)] can effectively aziridinate various aromatic olefins with arylsulfonyl azides under mild conditions, forming sulfonylated aziridines in excellent yields. The Co-based system enjoys several attributes associated with the relatively low cost of cobalt and the wide accessibility of arylsulfonyl azides. Furthermore, it generates stable dinitrogen as the only byproduct.
Nitrene Transfer Reactions Catalyzed by Gold Complexes
作者:Zigang Li、Xiangyu Ding、Chuan He
DOI:10.1021/jo060016t
日期:2006.8.1
We report here the first gold-catalyzed nitrenetransferreaction. A gold(I) compound, supported by 4,4‘,4‘ ‘-tri-tert-butyl-2,2‘:6‘,2‘ ‘-terpyridine (tBu3tpy) as the ligand, efficiently catalyzes olefin aziridination with the use of the commercially available oxidant PhI(OAc)2 and sulfonamides. This system also mediates carbene insertion into benzene.
我们在这里报告了第一个金催化的腈转移反应。由4,4',4''-三叔丁基-2,2':6',2'-叔吡啶(t Bu 3 tpy)担载的金(I)化合物有效催化烯烃使用可商购的氧化剂PhI(OAc)2和磺酰胺进行叠氮化。该系统还介导卡宾插入苯中。
Phosphine-promoted [4 + 3] annulation of allenoate with aziridines for synthesis of tetrahydroazepines: phosphine-dependent [3 + 3] and [4 + 3] pathways
In this manuscript, phosphine-dependent [3 + 3] and [4 + 3] annulation reactions of allenoate with aziridines were disclosed. The alkyldiphenylphosphine-promoted [4 + 3] annulation of allenoate with aziridines has been achieved under mild conditions, providing biologically interesting functionalized tetrahydroazepines in moderate to excellent yield with moderate to excellent regioselectivity and diastereoselectivity
Metal Porphyrin Catalyzed Olefin Aziridination with Sulfonyl Azides
申请人:Zhang X. Peter
公开号:US20110112288A1
公开(公告)日:2011-05-12
Cobalt(II) complex of P1 [Co(P1)], a new porphyrin that was designed on the basis of potential hydrogen bonding interactions in the metal-nitrene intermediate, is a highly active catalyst for olefin aziridination with azides. The [Co(P1)]-based system can be effectively employed for different combinations of aromatic olefins and arysulfonyl azides, synthesizing various sulfonylated aziridines in excellent yields. Besides its mild catalytic conditions, the Co-catalyzed aziridination process enjoys several attributes associated with the relatively low cost of cobalt and widely accessible arylsulfonyl azides. Furthermore, it generates stable dinitrogen as the only by-product.