Studies on the synthesis of some functionalized saturated azaheterocycles through oxidative ring opening/ring closing by reductive amination
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DOI: 10.1002/ajoc.202400818
Abstract: Selected functionalized saturated azaheterocycles have been prepared by ring expansion from their unsaturated counterpart or using substituted cycloalkenes involving oxidative ring opening/ring closing by reductive amination. Studies have been conducted regarding the outcome of the… read more here.
Keywords: chemistry; functionalized saturated; opening ring; ring opening ... See more keywords
Alternating ring‐opening copolymerization of cyclic anhydrides and epoxides by zeolitic imidazolate framework‐67: A promising approach
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DOI: 10.1002/aoc.7416
Abstract: The ring opening copolymerization (ROCOP) of epoxides and cyclic anhydrides is one of the most important ways to synthesize polyesters both in industrial and academic fields. Herein, the zeolitic imidazolate framework‐67 (ZIF‐67) was used as… read more here.
Keywords: opening copolymerization; rocop; copolymerization; ring opening ... See more keywords
Studies on the Catalytic Promiscuity of Limonene Epoxide Hydrolases in the Non‐hydrolytic Ring Opening of 1,2‐Epoxides
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DOI: 10.1002/cbic.201900694
Abstract: The non‐hydrolytic ring opening of 1,2‐epoxides in the presence of limonene epoxide hydrolases (LEHs) and different nucleophiles has been investigated. Lyophilized, wild‐type LEHs were tested in selected water‐saturated organic solvents in the presence of cyclohexene… read more here.
Keywords: opening epoxides; ring opening; hydrolytic ring; non hydrolytic ... See more keywords
Ring‐Opening Copolymerization of Styrene Oxide and Cyclic Anhydrides by using Highly Effective Zinc Amido–Oxazolinate Catalysts
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DOI: 10.1002/cctc.201601679
Abstract: Polyesters have been widely applied owing to their biodegradability and biocompatibility. Recently, catalytic ring‐opening copolymerization of cyclic anhydrides and epoxides has emerged as an effective approach for the synthesis of polyesters. Herein, we report a… read more here.
Keywords: ring opening; cyclic anhydrides; styrene oxide; opening copolymerization ... See more keywords
Enzymatic Ring‐Opening Polymerization of Lactones: Traditional Approaches and Alternative Strategies
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DOI: 10.1002/cctc.201900976
Abstract: Biodegradable polymers such as polylactides and other polylactones and their synthesis gain progressively importance. Enzymatic ring‐opening polymerization (eROP) is the next step sustainable synthesis of polyesters, also suitable for biomedical applications due to high selectivity… read more here.
Keywords: ring opening; opening polymerization; polymerization lactones; lactones traditional ... See more keywords
Substrate Directed Regio‐ and Enantioselective Ring‐Opening of Epoxides and Aziridines
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DOI: 10.1002/cctc.202301431
Abstract: The oxirane and aziridine rings are valuable building blocks in modern synthetic chemistry and catalytic asymmetric ring opening reactions of these three membered ring systems have emerged as a powerful chemical tool for the synthesis… read more here.
Keywords: regio enantioselective; ring opening; epoxides aziridines; substrate directed ... See more keywords
Highly Active N,O Zinc Guanidine Catalysts for the Ring-Opening Polymerization of Lactide.
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DOI: 10.1002/cssc.201701237
Abstract: New zinc guanidine complexes with N,O donor functionalities were prepared, characterized by X-Ray crystallography, and examined for their catalytic activity in the solvent-free ring-opening polymerization (ROP) of technical-grade rac-lactide at 150 °C. All complexes showed a… read more here.
Keywords: zinc guanidine; ring opening; polymerization; opening polymerization ... See more keywords
Regioselective Ring Opening of Glycidol to Monoalkyl Glyceryl Ethers Promoted by an [OSSO]-FeIII Triflate Complex.
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DOI: 10.1002/cssc.201901329
Abstract: A new Fe(III)-triflate complex, bearing a bis-thioether-di-phenolate [OSSO]-type ligand, is reported to promote the ring-opening of glycidol with alcohols under mild reaction conditions (0.05 mol% of catalyst and 80 °C). The reaction proceeds with high… read more here.
Keywords: ring opening; glyceryl ethers; opening glycidol; triflate complex ... See more keywords
Sustainable polythioesters via thio(no)lactones: monomer synthesis, ring-opening polymerization, end-of-life considerations and industrial perspectives.
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DOI: 10.1002/cssc.202202276
Abstract: As the environmental effects of plastics are of ever greater concern, the industry is driven towards more sustainable polymers. Besides sustainability, our fast-developing society imposes the need for highly versatile materials. While aliphatic polyesters (PEs)… read more here.
Keywords: end life; opening polymerization; thio lactones; thio ... See more keywords
Model Studies for the Preparation of Oxepanes and Fused Compounds by Tandem [4+3] Cycloaddition/Ring‐Opening Metathesis/Cross Metathesis
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DOI: 10.1002/ejoc.201700994
Abstract: Functionalised medium-sized ether rings were prepared in an efficient manner by [4+3] cycloaddition followed by ring-opening metathesis. This procedure provided medium-sized rings, which were shown to be useful for the assembly of fused bicyclic structures… read more here.
Keywords: ring opening; cycloaddition; chemistry; opening metathesis ... See more keywords
Catalytic Asymmetric Ring Opening Reactions of Vinylcyclopropanes
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DOI: 10.1002/ejoc.202301225
Abstract: Vinylcyclopropanes (VCPs) are important building blocks with multifaceted reactivity. Catalytic asymmetric ring opening of vinylcyclopropanes is a highly efficient process to access valuable chiral molecules with diverse functionalities that can be further functionalized for a… read more here.
Keywords: chemistry; asymmetric ring; ring opening; reactions vinylcyclopropanes ... See more keywords