A Water-Soluble Ruthenium Glycosylated Porphyrin Catalyst for Carbenoid Transfer Reactions in Aqueous Media with Applications in Bioconjugation Reactions
作者:Chi-Ming Ho、Jun-Long Zhang、Cong-Ying Zhou、On-Yee Chan、Jessie Jing Yan、Fu-Yi Zhang、Jie-Sheng Huang、Chi-Ming Che
DOI:10.1021/ja9077254
日期:2010.2.17
Water-soluble [Ru(II)(4-Glc-TPP)(CO)] (1, 4-Glc-TPP = meso-tetrakis(4-(beta-D-glucosyl)phenyl)porphyrinato dianion) is an active catalyst for the following carbenoid transfer reactions in aqueous media with good selectivities and up to 100% conversions: intermolecular cyclopropanation of styrenes (up to 76% yield), intramolecular cyclopropanation of an allylic diazoacetate (68% yield), intramolecular
[EN] MYOGLOBIN-BASED CATALYSTS FOR CARBENE TRANSFER REACTIONS<br/>[FR] CATALYSEURS À BASE DE MYOGLOBINE POUR RÉACTIONS DE TRANSFERT DE CARBÈNE
申请人:UNIV ROCHESTER
公开号:WO2016086015A1
公开(公告)日:2016-06-02
Methods are provided for carrying out carbene transfer transformations such as olefin cyclopropanation reactions, carbene heteroatom-H insertion reactions (heteroatom = N, S, Si), sigmatropic rearrangement reactions, and aldehyde olefination reactions with high efficiency and selectivity by using a novel class of myoglobin-based biocatalysts. These methods are useful for the synthesis of a variety of organic compounds which contain one or more new carbon-carbon or carbon-heteroatom (N, S, or Si) bond. The methods can be applied for conducting these transformations in vitro (i.e., using the biocatalyst in isolated form) and in vivo (i.e., using the biocatalyst in a whole cell system).
Soluble Polymer-Supported Ruthenium Porphyrin Catalysts for Epoxidation, Cyclopropanation, and Aziridination of Alkenes
作者:Jun-Long Zhang、Chi-Ming Che
DOI:10.1021/ol0259138
日期:2002.5.1
[reaction: see text] Attachment of poly(ethyleneglycol) (PEG) to ruthenium porphyrin via a covalent etheric bond gives soluble polymer-supported ruthenium catalysts 3-5. These catalysts exhibit high reactivity and selectivity toward alkene epoxidation with 2,6-dichloropyridine N-oxide and alkene cyclopropanation with diazo compounds. The application of these catalysts in the synthesis of unstable
A General Mechanism for the Copper- and Silver-Catalyzed Olefin Aziridination Reactions: Concomitant Involvement of the Singlet and Triplet Pathways
作者:Lourdes Maestre、W. M. C. Sameera、M. Mar Díaz-Requejo、Feliu Maseras、Pedro J. Pérez
DOI:10.1021/ja307229e
日期:2013.1.30
singlet surfaces, which induce the direct formation of the aziridines, and stereochemistry of the olefin is retained. In the case of copper, a radical intermediate is formed, and this intermediate constitutes the starting point for competition steps involving ring-closure (through a MECP between the open-shell singlet and triplet surfaces) or carbon-carbonbond rotation, and explains the loss of stereochemistry
Transmission of electronic effects through 2-[donor]-1-[acceptor]-cyclopropane
作者:Miguel E. Alonso、Sarah V. Pekerar、Maria L. Borgo
DOI:10.1002/mrc.1260281110
日期:1990.11
The through‐ring conjugation between π‐donor and attractor substitutents on vicinal carbons of cyclopropane with the direct participation of the ring was assessed using proton and 13C NMR. Appropriate 1H NMR correlations were obtained between σp and δH of the trimethylene protons. However, aryl through‐space field effects were found to obscure individual conjugative effects. Conversely, the 13C NMR