Control of Helix Sense by Composition of Chiral–Achiral Copolymers of N??Propargylbenzamides

J Tabei, M Shiotsuki, T Sato, F Sanda…

Index: Tabei, Junichi; Shiotsuki, Masashi; Sato, Takahiro; Sanda, Fumio; Masuda, Toshio Chemistry - A European Journal, 2005 , vol. 11, # 12 p. 3591 - 3598

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Citation Number: 36

Abstract

Abstract N-Propargylbenzamides 1–7 were polymerized with (nbd) Rh+[η 6-C 6 H 5 B−(C 6 H 5) 3] to afford polymers with moderate molecular weights (M n= 26 000–51 000) in good yields. The 1 H NMR spectra demonstrated that the polymers have fairly stereoregular structures (81–88% cis). The optically active polymers, poly (1) and poly (2), were proven by their intense CD signals and large optical rotations to adopt a stable helical conformation ...