Journal ArticleDOI
Effect of catalyst on zwitterionic intermediacy in additions of dimethyl diazomalonate to vinyl ethers
Miguel E. Alonso,Raiza Fernández +1 more
Reads0
Chats0
TLDR
In this paper, the reaction of dimethyl diazomalonate with 2-alkoxy-6-methyl-3,4-dihydro-2H-pyran in hot fluorobenzene has been studied in the presence of some transition metal catalysts.About:
This article is published in Tetrahedron.The article was published on 1989-01-01. It has received 18 citations till now. The article focuses on the topics: Carbenium ion & Pyran.read more
Citations
More filters
Journal ArticleDOI
Recent Advances in Asymmetric Catalytic Metal Carbene Transformations.
Michael P. Doyle,David C. Forbes +1 more
Journal ArticleDOI
Chiral catalysts for enantioselective carbenoid cyclopropanation reactions
TL;DR: In this article, the major advances in chiral catalyst design and development are described, and a uniform mechanistic interpretation is advanced to explain the results accumulated in reported investigations, focusing on chiral salicylaldimine and semicorrin/bis-oxazoline copper catalysts and on the newest class of chiral catalysts for enantioselective carbenoid reactions.
Reference EntryDOI
Intermolecular Metal‐Catalyzed Carbenoid Cyclopropanations
TL;DR: The metal-catalyzed decomposition of diazo compounds in the presence of alkenes is a well-established reaction as mentioned in this paper, and it has been recognized that a wide array of carbenoid structures can be utilized in this chemistry, leading to a broad range of synthetic applications.
Journal ArticleDOI
Highly Enantioselective Intramolecular Cyclopropanation Reactions of N-Allylic-N-methyldiazoacetamides Catalyzed by Chiral Dirhodium(II) Carboxamidates
Michael P. Doyle,A. V. Kalinin +1 more
TL;DR: In this paper, dirhodium(II) tetrakis[methyl 2-oxo-1-(3-phenylpropanoyl)imidazolidin-4(S)-carboxylate], Rh2(4S)-MPPIM)4 was preferred for substituted N-allylic-N-methyldiazoacetamides from which 92−95% ee's were obtained in intramolecular cyclopropanation reactions (88−95 percent yields), even when the catalyst was employed in only 0.
Journal ArticleDOI
Dirhodium(II) Tetracarboxylate carbenoids as catalytic intermediates
TL;DR: In this article, a more detailed mechanistic study of rh 2 (O 2 CR) 4 catalysis is presented, with significant participation by the backside of the Rh atom.
References
More filters
Journal ArticleDOI
Catalytic methods for metal carbene transformations
TL;DR: Doyle et al. as discussed by the authors used transition-metal catalysts to generate transient electrophilic metal carhenes and achieved state-of-the-art performance on the Dreyfus Foundation Teacher-Scholar Award and Chemical Manufacturers Association Catalyst Award.
Journal ArticleDOI
Copper(I) catalysis in cyclopropanations with diazo compounds. Role of olefin coordination
Robert G. Salomon,Jay K. Kochi +1 more
Journal ArticleDOI
Electrophilic metal carbenes as reaction intermediates in catalytic reactions
Journal ArticleDOI
Transition-Metal-Catalyzed Reactions of Diazo Compounds. 1. Cyclopropanation of Double Bonds
Journal ArticleDOI
Multiple metal-carbon bonds. 43. Well-characterized, highly active, Lewis acid free olefin metathesis catalysts
TL;DR: In this article, a complexe de W de type W(CH−t−Bu)(NR)(OR') 2, OR'=OC(Me)(CF 3 ) 2