A novel synthetic route to poly(β-ketone)s via poly(alkoxyethyne)s

✍ Scribed by Shin-ichiro Shoda; Akio Komenoi; Tomochika Fujioka; Yasunori Okumura; Shiro Kobayashi

• Book ID: 102482743
• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 360 KB
• Volume: 197
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1996.021970218

✦ Synopsis

Abstract

Isopropoxyethyne (1a) and tert‐butoxyethyne (1b) were polymerized using group 5 and 6 transition metal catalysts to give poly(isopropoxyethyne) (2a) and poly(tert‐butoxyethyne) (2b), respectively. The weight‐average molecular weight (M̄~w~) of the resulting poly(alkoxyethyne)s was up to 1.0 × 10^4^. Among the transition metal catalysts, a tungsten alkoxide or a molybdenum alkoxide having low Lewis acidity were found to effectively promote the polymerization without causing side reactions. Poly(tert‐butoxyethyne) was successfully converted to poly(β‐ketone) 3 by acid hydrolysis of the tert‐butyl vinyl moiety.