The hydrogenation of esters catalyzed by a manganese complex of phosphine-aminopyridine ligand was developed. Using this protocol, a variety of (hetero)aromatic and aliphatic carboxylates including biomass-derived esters and lactones were hydrogenated to primary alcohols with 63–98% yields. The manganese catalyst was found to be active for the hydrogenation of methyl benzoate, providing benzyl alcohol
New phosphine-amino-alcohol tridentate ligands for ruthenium catalyzed asymmetric transfer hydrogenation of ketones
作者:Orhan Altan、Mustafa Kemal Yılmaz
DOI:10.1016/j.jorganchem.2018.02.046
日期:2018.4
ol tridentateligands (3a-c) and six new rutheniumcomplexes (4a-c and 5a-c) were synthesized and characterized. Catalytic activities of the metal complexes were tested on aryl alkyl ketones. All of the substrates were converted to related sec-alcohols in excellent yields (up to 99%), but enantioselectivities were insufficient (up to 40% ee). Despite the catalytic performance of 5a-c complexes can
TETRAZINE-CONTAINING COMPOUNDS AND SYNTHETIC METHODS THEREOF
申请人:The Regents of the University of California
公开号:US20160223559A1
公开(公告)日:2016-08-04
Described herein are tetrazine derivatives and efficient synthetic methods of synthesis thereof using elimination-Heck cascade reaction. Provided herein is the synthesis of conjugated tetrazines from the tetrazine derivatives. Also provided herein are methods of use of the conjugated tetrazines as fluorogenic probes for live-cell imaging.
Application of <i>P,N-</i>Sulfinyl Imine Ligands to Iridium-Catalyzed Asymmetric Hydrogenation of Olefins
作者:Laurie B. Schenkel、Jonathan A. Ellman
DOI:10.1021/jo035675+
日期:2004.3.1
The utility of a novel class of P,N-ligands incorporating a chiral sulfinyl imine moiety is demonstrated in the iridium-catalyzedhydrogenation of both functionalized and unfunctionalized olefins, in which enantioselectivities of up to 94% are achieved. The modularity of the P,N-sulfinyl ligand class is highlighted by the facile preparation of a variety of sterically and electronically different ligands
Mn(<scp>i</scp>) phosphine-amino-phosphinites: a highly modular class of pincer complexes for enantioselective transfer hydrogenation of aryl-alkyl ketones
作者:Harikrishnan Jayaprakash
DOI:10.1039/d1dt02257a
日期:——
A series of Mn(I) catalysts with readily accessible and more π-accepting phosphine-amino-phosphinite (P′(O)N(H)P) pincer ligands have been explored for the asymmetric transferhydrogenation of aryl-alkyl ketones which led to good to high enantioselectivities (up to 98%) compared to other reported Mn-based catalysts for such reactions. The easy tunability of the chiral backbone and the phosphine moieties
一系列具有易于获得且更多π接受的膦-氨基-次亚膦酸酯(P'(O)N(H)P)钳配体的Mn( I )催化剂已被探索用于芳基烷基酮的不对称转移氢化,从而导致与其他报道的用于此类反应的锰基催化剂相比,该催化剂具有良好到高的对映选择性(高达 98%)。手性主链和膦部分的简单可调性使 P'(O)N(H)P 成为众所周知的 PNP 型钳子的替代配体框架。