Optically active helical vinyl polymers via helix-sense-selective anionic polymerization of (S)-3-vinyl-2,2′-bis(methoxymethoxy)-1,1′-binaphthyl

Add time:09/24/2019    Source:sciencedirect.com

A novel vinyl monomer, (S)-3-vinyl-2,2′-bis(methoxymethoxy)-1,1′-binaphthyl 2, was synthesized and underwent helix-sense-selective anionic polymerization to obtain helical polymers with an excess screw sense. The polymer ([α]36525 = −1610.0°) exhibited optical rotation as large as fourfold that of the monomer ([α]36525 = −356.0°). Poly-2 was confirmed to keep a prevailing helicity of backbone in solution by means of comparing the specific optical rotation, the CD and UV–vis spectra with that of monomer 2 and the model compound such as (S)-3-ethyl-2,2′-bis(methoxymethoxy)-1,1′-binaphthyl 3. The helical conformation of poly-2 was stable and insensitive to temperature variation. The excess value of one-handed helicity of poly-2 decreased with the increase of polymerization temperature.

We also recommend Trading Suppliers and Manufacturers of 5-(methoxymethoxy)-Pentanoicacidmethylester (cas 138613-36-2). Pls Click Website Link as below: cas 138613-36-2 suppliers

Prev:Enantiospecific total synthesis of 15-hydroxy-5-(methoxymethoxy)crinipellin-9-one
Next:Synthesis and insecticidal activity of novel N-oxydihydropyrroles: 4-hydroxy-3-mesityl-1-methoxymethoxy derivatives with various substituents at the 5-position)