In: Materials Chemistry Frontiers, 2020, vol. 4, no. 9, p. 2791–2796
The second-generation Hoveyda–Grubbs (HG2) catalyst, which has a small initiation to propagation rate ratio (ki/kp) in ring-opening metathesis polymerization (ROMP), was successfully used in a recently developed catalytic living ROMP. This proved that slow-initiating catalysts can enable ROMP in a living fashion to produce polymers with narrow dispersity and controlled molecular weight. The...
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In: Dalton Transactions, 2018, vol. 47, no. 48, p. 17221–17232
Herein we report the synthesis of a new biomaterial designed for targeted delivery of poorly water-soluble inorganic anticancer drugs, with a focus on colorectal cancer. Diatomaceous earth microparticles derived from marine microalgae were coated with vitamin B12 (cyanocobalamin) as a tumor targeting agent and loaded with the well- known anticancer agents cisplatin, 5-fluorouracil (5-FU), and...
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In: Organic & Biomolecular Chemistry, 2020, vol. 18, no. 40, p. 8034–8057
Metathesis reactions are one of the most reliable and prevalent ways of creating a C– C bond in synthesis. Photochemical variants exist, and they have proven extremely useful for the construction of complex molecules, from natural products to Möbius rings. A variety of starting materials can undergo photometathesis reactions, including alkenes, alkynes, carbonyls, thiocarbonyls, and...
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In: Angewandte Chemie International Edition, 2020, vol. 59, no. 32, p. 13597-13601
Using a one-step synthetic route for block copolymers avoids the repeated addition of monomers to the polymerization mixture, which can easily lead to contamination and, therefore, to the unwanted termination of chain growth. For this purpose, monomers (M1–M5) with different steric hindrances and different propagation rates are explored. Copolymerization of M1 (propagating rapidly) with M2...
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In: ACS Macro Letters, 2019, vol. 8, no. 10, p. 1396–1401
We describe a protocol to synthesize alternating telechelic ROMP copolymers of 7- oxa-norbornene derivatives and cycloalkenes under catalytic conditions. These copolymers were synthesized using Grubbs’ second-generation catalyst. The sterically less hindered backbone double bonds of the resulting alternating copolymers facilitate the chain transfer (secondary metathesis) reactions. In the ...
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In: Synlett, 2019, vol. 30, no. 18, p. 2051–2057
Over the last two decades many synthetic methods have been reported to selectively introduce a number of different functional groups at the chain end of a living ring- opening metathesis polymer. In this personal account, I would like to focus on a few such methods developed in my research group over the last several years and how these led to the discovery of catalytic living ring-opening...
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In: Angewandte Chemie International Edition, 2019, vol. 58, no. 43, p. 15278–15282
A recently developed catalytic living ring opening metathesis polymerisation (ROMP) was investigated using a series of reversible chain transfer agents (CTA) carrying either cyclopentene or cyclohexene rings, differing only in ring strain. All cyclopentene derivatives examined showed significantly faster reaction rates than the corresponding cyclohexene derivatives. This resulted in lower...
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In: Polymer Chemistry, 2019, vol. 10, no. 16, p. 2057–2063
This paper deals with the synthesis and investigation of comb-like poly(norbornene)s carrying lateral rod-like aramid groups. Two types of norbornene-based monomers were synthesized and copolymerized with a norbornene carrying an aliphatic side chain using ring opening metathesis polymerization (ROMP). The new monomers contain aramid derivatives that display different types of non-covalent...
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In: Catalysis Letters, 2014, vol. 144, no. 3, p. 373-379
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In: Clinical Chemistry and Laboratory Medicine (CCLM), 2016, vol. 54, no. 4, p. 617-625
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