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

Shin Ichiro Shoda; Akio Komenoi; Tomochika Fujioka; Yasunori Okumura; Shiro Kobayashi

doi:10.1002/macp.1996.021970218

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

Shin Ichiro Shoda, Akio Komenoi, Tomochika Fujioka, Yasunori Okumura, Shiro Kobayashi

ENG - Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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 × 10⁴. 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.

Original language	English
Pages (from-to)	633-640
Number of pages	8
Journal	Macromolecular Chemistry and Physics
Volume	197
Issue number	2
DOIs	https://doi.org/10.1002/macp.1996.021970218
Publication status	Published - 1996 Feb

ASJC Scopus subject areas

Condensed Matter Physics
Physical and Theoretical Chemistry
Organic Chemistry
Polymers and Plastics
Materials Chemistry

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10.1002/macp.1996.021970218

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title = "A novel synthetic route to poly(β-ketone)s via poly(alkoxyethyne)s",

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 ({\=M}w) of the resulting poly(alkoxyethyne)s was up to 1.0 × 104. 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.",

author = "Shoda, {Shin Ichiro} and Akio Komenoi and Tomochika Fujioka and Yasunori Okumura and Shiro Kobayashi",

year = "1996",

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T1 - A novel synthetic route to poly(β-ketone)s via poly(alkoxyethyne)s

AU - Shoda, Shin Ichiro

AU - Komenoi, Akio

AU - Fujioka, Tomochika

AU - Okumura, Yasunori

AU - Kobayashi, Shiro

PY - 1996/2

Y1 - 1996/2

N2 - 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 (M̄w) of the resulting poly(alkoxyethyne)s was up to 1.0 × 104. 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.

AB - 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 (M̄w) of the resulting poly(alkoxyethyne)s was up to 1.0 × 104. 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.

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