ChemInform Abstract: Reaction of Aminocarbene Complexes of Chromium with Alkynes. Part 5. Influence of the Ring Size on the Product Distribution. Formation of Pyrroles from Pyrrolidine and Its Derivative-Substituted Carbene Complexes.

ChemInform ◽  
2010 ◽  
Vol 26 (41) ◽  
pp. no-no
Author(s):  
A. PARLIER ◽  
M. RUDLER ◽  
H. RUDLER ◽  
R. GOUMONT ◽  
J.-C. DARAN ◽  
...  
Keyword(s):  
Product Distribution ◽  
Ring Size ◽  
Carbene Complexes

Reaction of Aminocarbene Complexes of Chromium with Alkynes. 5. Influence of the Ring Size on the Product Distribution. Formation of Pyrroles from Pyrrolidine and Its Derivative-Substituted Carbene Complexes

1995 ◽  
Vol 14 (6) ◽  
pp. 2760-2774 ◽  
Author(s):  
Andree Parlier ◽  
Michele Rudler ◽  
Henri Rudler ◽  
Regis Goumont ◽  
Jean-Claude Daran ◽  
...  
Keyword(s):  
Product Distribution ◽  
Ring Size ◽  
Carbene Complexes

Investigation of the effect of ring size on the product distribution for the Schiff base reaction of 2-acetylcycloalkanones with diamino alkanes

1995 ◽  
Vol 73 (1) ◽  
pp. 16-21 ◽  
Author(s):  
Raul G. Enriquez ◽  
Juan M. Fernandez-G ◽  
Ismael Leon ◽  
William F. Reynolds ◽  
Ji.-Ping Yang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Condensation Reaction ◽  
2D Nmr ◽  
Product Distribution ◽  
Major Product ◽  
Ring Size ◽  
Amino Group ◽  
Amino Groups ◽  
Similar Product ◽  
Acetyl Group

The Schiff base condensation reaction of 1,2-diaminoethane with a series of 2-acetylcycloalkanones (from cyclopentanone to cyclooctanone) has been investigated and the products characterized by two-dimensional nuclear magnetic resonance. The site of attack of the amino groups, i.e., ring ketone or acetyl ketone, is determined primarily by ring size. 2-Acetylcyclohexanone yields two products in ca. 9:1 ratio, the major product where the two amino groups attack at the ring ketones of two different cyclohexanone molecules, and the minor product where one amino group attacks one ring carbonyl of one cyclohexanone while the second amino group attacks the acetyl group of another. 2-Acetylcyclopentanone yields all three possible products with the major product involving attack at the acetyl groups of two different cyclopentanones. The corresponding reactions for 2-acetylcycloheptanone and 2-acetylcyclooctanone each give a single product corresponding to attack at the acetyl groups of two different cycloalkanones. Similar product distributions are observed for the reactions of the different 2-acetylcycloalkanones with 1,4-diaminobutane. Keywords: Schiff base reactions, diketones, 2D NMR.

Modulating reactivity in iridium bis(N-heterocyclic carbene) complexes: influence of ring size on E–H bond activation chemistry

2014 ◽  
Vol 43 (32) ◽  
pp. 12288-12298 ◽  
Author(s):  
Nicholas Phillips ◽  
Christina Y. Tang ◽  
Rémi Tirfoin ◽  
Michael J. Kelly ◽  
Amber L. Thompson ◽  
...  
Keyword(s):  
Bond Activation ◽  
Ring Size ◽  
Carbene Complexes

Critical influence of NHC ring size: highly labile [Ir(5-Mes)2(H)2]+can only be studied by trapping experiments, while [Ir(6-Mes)2(H)2]+and [Ir(6-Xyl)2(H)2]+are air/moisture stable.

Substrate regulation of product distribution in the reactions of arylchromium carbene complexes with alkynes

1991 ◽  
Vol 113 (24) ◽  
pp. 9293-9319 ◽  
Author(s):  
Mary Ellen Bos ◽  
William D. Wulff ◽  
Ross A. Miller ◽  
Steven Chamberlin ◽  
Timothy A. Brandvold
Keyword(s):  
Product Distribution ◽  
Carbene Complexes ◽  
Substrate Regulation

Ring-expanded iridium and rhodiumN-heterocyclic carbene complexes: a comparative DFT study of heterocycle ring size and metal center diversity

2017 ◽  
Vol 70 (7) ◽  
pp. 1270-1284 ◽  
Author(s):  
E. Ö. Karaca ◽  
M. Akkoç ◽  
E. Öz ◽  
S. Altin ◽  
V. Dorcet ◽  
...  
Keyword(s):  
Metal Center ◽  
Dft Study ◽  
Ring Size ◽  
Carbene Complexes

ChemInform Abstract: Substrate Regulation of Product Distribution in the Reactions of Aryl Chromium Carbene Complexes with Alkynes.

ChemInform ◽  
2010 ◽  
Vol 23 (12) ◽  
pp. no-no
Author(s):  
M. E. BOS ◽  
W. D. WULFF ◽  
R. A. MILLER ◽  
S. CHAMBERLIN ◽  
T. A. BRANDVOLD
Keyword(s):  
Product Distribution ◽  
Carbene Complexes ◽  
Substrate Regulation ◽  
Chromium Carbene

Irradiation of Imine-Group VI Carbene Complexes in the Presence of Alkynes. 2. Control of Product Distribution

2005 ◽  
Vol 70 (17) ◽  
pp. 6705-6713 ◽  
Author(s):  
Diego Sampedro ◽  
Míriam Caro ◽  
Miguel A. Rodríguez ◽  
Pedro J. Campos
Keyword(s):  
Product Distribution ◽  
Group Vi ◽  
Carbene Complexes ◽  
Imine Group
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