[OsH4(PPh3)3]: New Catalyst for the Selective Cyclopropanation of Activated Olefins

1996 ◽  
Vol 61 (12) ◽  
pp. 1798-1804 ◽  
Author(s):  
Albert Demonceau ◽  
François Simal ◽  
Corine A. Lemoine ◽  
Alfred F. Noels ◽  
Igor T. Chizhevsky ◽  
...  
Keyword(s):  
Title Compound ◽  
Efficient Catalyst ◽  
Ethyl Diazoacetate ◽  
Styrene Derivatives ◽  
Activated Olefins ◽  
Cyclic Alkenes

The title compound was found to be an efficient catalyst for the selective cyclopropanation of activated olefins by ethyl diazoacetate. The cyclopropane yields range from moderate to good (75 to 95%) for activated olefins such as styrene and styrene derivatives, but are rather low (20 to 30%) for non-activated olefins such as terminal and cyclic alkenes. In the intermolecular competition, styrene was 45 times more reactive than cyclooctene. In all cases, trans (exo) cyclopropane predominated over the cis (endo) isomer.

Palladium(II) Acetate, an Efficient Catalyst for Cyclopropanation Reactions with Ethyl Diazoacetate

Synthesis ◽  
1983 ◽  
Vol 1983 (06) ◽  
pp. 469-470 ◽  
Author(s):  
Michał W. Majchrzak ◽  
Antoni Kotełko ◽  
Joseph B. Lambert
Keyword(s):  
Efficient Catalyst ◽  
Ethyl Diazoacetate

scholarly journals Cobalt- and rhodium-catalyzed carboxylation using carbon dioxide as the C1 source

2018 ◽  
Vol 14 ◽  
pp. 2435-2460 ◽  
Author(s):  
Tetsuaki Fujihara ◽  
Yasushi Tsuji
Keyword(s):  
Carbon Dioxide ◽  
Aromatic Compounds ◽  
Coupling Reaction ◽  
Cobalt Complexes ◽  
Efficient Catalyst ◽  
Carbon Bond ◽  
Bond Forming ◽  
Carbon Carbon Bond ◽  
Styrene Derivatives ◽  
Reductive Carboxylation

Carbon dioxide (CO2) is one of the most important materials as renewable chemical feedstock. In this review, the Co- and Rh-catalyzed transformation of CO2 via carbon–carbon bond-forming reactions is summarized. Combinations of metals (cobalt or rhodium), substrates, and reducing agents realize efficient carboxylation reactions using CO2. The carboxylation of propargyl acetates and alkenyl triflates using cobalt complexes as well as the cobalt-catalyzed reductive carboxylation of α,β-unsaturated nitriles and carboxyamides in the presence of Et2Zn proceed. A Co complex has been demonstrated to act as an efficient catalyst in the carboxylation of allylic C(sp3)–H bonds. Employing zinc as the reductant, carboxyzincation and the four-component coupling reaction between alkyne, acrylates, CO2, and zinc occur efficiently. Rh complexes also catalyze the carboxylation of arylboronic esters, C(sp2)–H carboxylation of aromatic compounds, and hydrocarboxylation of styrene derivatives. The Rh-catalyzed [2 + 2 + 2] cycloaddition of diynes and CO2 proceeds to afford pyrones.

Novel Manganese Complex as an Efficient Catalyst for the Isobutyraldehyde-Mediated Epoxidation of Cyclic Alkenes with Dioxygen

2005 ◽  
Vol 347 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Jian-Ying Qi ◽  
Yue-Ming Li ◽  
Zhong-Yuan Zhou ◽  
Chi-Ming Che ◽  
Chi-Hung Yeung ◽  
...  
Keyword(s):  
Manganese Complex ◽  
Efficient Catalyst ◽  
Cyclic Alkenes

Crystal structure of 12H+-2,4-benzo-1,5-dioxa-8,12,16-triaza-cyclooctadec-2-ene-7,17-dione picrate

2002 ◽  
Vol 217 (1) ◽  
Author(s):  
G. Hundal ◽  
S. Kumar ◽  
M. S. Hundal ◽  
H. Singh
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Compound C

AbstractThe title compound [C

A neutron diffraction study of hydrogen bonding in the deuterium (hydrogen) L-arginine phosphate monohydrate

1997 ◽  
Vol 212 (3) ◽  
Author(s):  
Z. Cheng ◽  
Y. Cheng ◽  
L. Guo ◽  
D. Xu
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Title Compound ◽  
Neutron Diffraction Study ◽  
Chemical Formula

AbstractThe crystal structure of the title compound D(H)LAP with chemical formula (D

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