scholarly journals Stereoselective Olefin Ring‐Opening Cross Metathesis Catalyzed by Molybdenum Imido Alkylidene N ‐Heterocyclic Carbene Complexes

2019 ◽  
Vol 361 (24) ◽  
pp. 5596-5604 ◽  
Author(s):  
Mohasin Momin ◽  
Gergely M. Nagy ◽  
Michael R. Buchmeiser
Keyword(s):  
Ring Opening ◽  
Carbene Complexes ◽  
Cross Metathesis

Endgroup and Sidechain Functionalization of Surface-Initiated ROMP Thin Films: Progress Towards ROMP-Based Molecular Wires

2018 ◽  
Author(s):  
Nicholas Marshall
Keyword(s):  
Thin Films ◽  
Contact Angle ◽  
Cyclic Voltammetry ◽  
Polymer Films ◽  
Conjugated Polymer ◽  
Ring Opening ◽  
Molecular Wires ◽  
Metathesis Polymerization ◽  
Cross Metathesis ◽  
Active Ester

A set of experiments in surface-initiated ring-opening metathesis polymerization, including end-functionalization of growing brushes and contact angle/cyclic voltammetry measurements. We report preparation and CV of two different conjugated polymer films, and several endgroup and sidechain functionalization experiments using cross-metathesis and active ester substitution.<br>

Diversity-Oriented Synthesis of Highly Functionalized Alicycles across Dipolar Cycloaddition/Metathesis Reaction

Synlett ◽  
2021 ◽  
Author(s):  
Loránd Kiss ◽  
Zsanett Benke ◽  
Melinda Nonn ◽  
Attila M. Remete ◽  
Santos Fustero
Keyword(s):  
Amino Acid ◽  
Ring Opening ◽  
Nitrile Oxide ◽  
Amino Acid Derivatives ◽  
Selective Synthesis ◽  
Chemical Transformations ◽  
Bond Functionalization ◽  
Cross Metathesis ◽  
Chlorosulfonyl Isocyanate ◽  
Biological Potential

AbstractThis Account gives an insight into the selective functionalization of some readily available commercial cyclodienes across simple chemical transformations into functionalized small-molecular scaffolds. The syntheses involved selective cycloadditions, followed by ring-opening metathesis (ROM) of the resulting azetidin-2-one derivatives or isoxazoline frameworks and selective cross metathesis (CM) by discrimination of the C=C bonds on the alkenylated heterocycles. The CM protocols have been described when investigated under various conditions with the purpose on exploring chemodifferentiation of the olefin bonds and a study on the access of the corresponding functionalized β-lactam or isoxazoline derivatives is presented. Due to the expanding importance of organofluorine chemistry in drug research as well as of the high biological potential of β-lactam derivatives several illustrative examples to the access of some fluorine-containing molecular entities is also presented in this synopsis.1 Introduction2 Ring C=C Bond Functionalization of Some Cycloalkene β-Amino Acid Derivatives across Chlorosulfonyl Isocyanate Cycloaddition3 Ring C=C Bond Functionalization of Some Cycloalkene β-Amino Acid Derivatives across Nitrile Oxide Cycloaddition4 Ring C=C Bond Functionalization of Some Cycloalkene β-Amino Acid Derivatives across Metathesis5 Functionalization of sSome Cyclodienes across Nitrile Oxide Cycloaddition6 Selective Synthesis of Functionalized Alicycles across Ring-Opening Metathesis7 Selective Synthesis of Functionalized Alicycles through Cross Metathesis8 Summary and Outlook9 List of Abbreviations

Model Studies for the Preparation of Oxepanes and Fused Compounds by Tandem [4+3] Cycloaddition/Ring-Opening Metathesis/Cross Metathesis

2017 ◽  
Vol 2017 (41) ◽  
pp. 6202-6208 ◽  
Author(s):  
Paolo Disetti ◽  
Linda Piras ◽  
Maria Moccia ◽  
Michele Saviano ◽  
Mauro F. A. Adamo
Keyword(s):  
Ring Opening ◽  
Model Studies ◽  
Cross Metathesis

Cationic tungsten imido alkylidene N-heterocyclic carbene complexes for stereospecific ring-opening metathesis polymerization of norbornene derivatives

2021 ◽  
Author(s):  
Janis V. Musso ◽  
Mathis Benedikter ◽  
Paul Gebel ◽  
Vincent Gramm ◽  
Dongren Wang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Metathesis Polymerization ◽  
Carbene Complexes ◽  
Metathesis Polymerization ◽  
Norbornene Derivatives

Cationic W alkylidene N-heterocyclic carbene complexes allow for the stereospecific ring-opening metathesis polymerization of norbornenes with high trans-iso- and high cis-syndiospecificity, respectively.

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