Month: September 2021

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Abstract: A Br°nsted acid-catalyzed selective arene-ynamide cyclization is described. This reaction proceeds via a keteniminium intermediate and enables the preparation of seven-membered ring enamide products. Mechanistic studies uncover an unusual product inhibition behavior. Graphical abstract: [Figure not available: see fulltext.].

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Chemistry is traditionally divided into organic and inorganic chemistry. Reference of 1676-86-4, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1676-86-4

Novel thermoplastic elastomers based on multi-block copolymers of poly(l-lysine) (PLL), poly(N-epsilon-carbobenzyloxyl-l-lysine) (PZLL), poly(epsilon-caprolactone) (PCL), and poly(ethylene glycol) (PEG) were synthesized by combination of ring-opening polymerization (ROP) and chain extension via l-lysine diisocyanate (LDI). SEC and 1H NMR were used to characterize the multi-block copolymers, with number-average molecular weights between 38,900 and 73,400 g/mol. Multi-block copolymers were proved to be good thermoplastic elastomers with Young’s modulus between 5 and 60 MPa and tensile strain up to 1300%. The PLL-containing multi-block copolymers were electrospun into non-woven mats that exhibited high surface hydrophilicity and wettability. The polypeptide?polyester materials were biocompatible, bio-based and environment-friendly for promising wide applications.

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Reference：
Oxazolidine – Wikipedia,
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