PREPARATION OF SEVERAL NEW TRANSITION METAL HYDRIDO COMPLEXES OF A TYPE MH(Y)L<sub>n</sub>(M = Ni, Pd, Pt; Y = IMIDO, ALKENYL CARBOXYLATO) AND ELIMINATION OF HY FROM THE COMPLEXES ON INTERACTION WITH π-ACIDS
作者:Takakazu Yamamoto、Kenji Sano、Akio Yamamoto
DOI:10.1246/cl.1982.907
日期:1982.6.5
Pd) and trans-PtH(OCOR) (PCy3)2(R = –C(CH3)=CH2, –CH2CH=CH2) have been prepared by oxidative addition of succinimide or the corresponding acid to the zero-valent transition metal complexes. Treatment of the hydrido complexes with π-acids such as CO and maleic anhydride causes elimination of succinimide or RCOOH.
Mechanism and Scope of Nickel-Catalyzed Decarbonylative Borylation of Carboxylic Acid Fluorides
作者:Christian A. Malapit、James R. Bour、Simon R. Laursen、Melanie S. Sanford
DOI:10.1021/jacs.9b08961
日期:2019.10.30
Article describes the development of a base-free, nickel-catalyzeddecarbonylative coupling of carboxylic acid fluorides with diboron reagents to selectively afford aryl boronate ester products. Detailed studies were conducted to assess the relative rates of direct transmetalation between aryl boronate esters and diboron reagents and a bisphosphine nickel(aryl)(fluoride) intermediate. These investigations
Nickel-Catalyzed Decarbonylative Coupling of Aryl Esters and Arylboronic Acids
作者:Nicole A. LaBerge、Jennifer A. Love
DOI:10.1002/ejoc.201500630
日期:2015.9
accessed by coupling aryl and heteroaryl esters with boronic acids in Suzuki–Miyaura-type decarbonylative cross-coupling catalyzed by an affordable catalyst system composed of Ni(cod)2 and PCy3. The methodology is tolerant of a variety of functional groups and presents an attractive alternative to the use of palladium catalysis currently used in industry to acquire such bis(hetero)aryls, but also reveals
Controlled Photoredox Ring-Opening Polymerization of <i>O</i>-Carboxyanhydrides
作者:Quanyou Feng、Rong Tong
DOI:10.1021/jacs.7b01462
日期:2017.5.3
Poly(α-hydroxyacids) are important biodegradable polymers with wide applications. Attempts to synthesize them from O-carboxyanhydrides with pendant functional groups by various methods, including methods involving organocatalysts or organometallics, have been plagued by uncontrolled polymerization, including epimerization for some monomers, which hampers the preparation of stereoregular high-molecular-weight
Oxidative Addition of Esters of Formic Acid and β-Lactones to Ni(0)-Complexes Involving Cleavage of the C–O Bond
作者:Takakazu Yamamoto、Junichi Ishizu、Akio Yamamoto
DOI:10.1246/bcsj.55.623
日期:1982.2
CH2C6H5), with Ni(0)-complexes (mixtures of bis(1,5-cyclooctadiene)nickel (Ni(cod)2) and tertiary phosphines (PR′3)) lead to decarbonylation of HCOOR to afford (Ni(CO)n (PR″3)4−n and ROH. Vinyl formate gives a mixture of CH3CHO, Ni(CO)n(PR′3)4−n, C2H4, and CO2 on interaction with the Ni(0)-complexes. β-Lactones liberate CO2 on treatment with the Ni(0)-complexes. Oxidativeaddition of the reactants to