Apr, 2013
Asymmetric Coupling Polymerizations of 2,3-Dihalido-N-substituted Maleimide Derivatives in the Presence of Chiral Bisoxazolines
Chemistry Letters
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- Volume
- 42
- Number
- 4
- First page
- 366
- Last page
- 368
- Language
- English
- Publishing type
- Research paper (scientific journal)
- DOI
- 10.1246/cl.121259
- Publisher
- The Chemical Society of Japan
Yamamoto coupling polymerizations of 2,3-dihalido-N-substituted maleimides (DXRMI) were carried out using nickel catalysts. In addition, coupling reactions of 2,3-dihalido-N-cyclohexylmaleimide (DXCHMI) were performed with nickel complexes in the presence of directly coupled chiral bisoxazolines (R′box) to give optically active poly(N-substituted maleimide-2,3-diyl)s [poly(RMI)s] (specific rotation [α]435 = +6.0 to −34.6°). Polymers with number-average molecular weights (Mn) ranging from 270 to 36200 were obtained in 17% to quantitative yields. Poly(N-cyclohexylmaleimide-2,3-diyl) [poly(CHMI)] formed with [Ni(cod)2]–R′box exhibited the largest absolute value, [α]435 = −34.6°.
- Link information
- ID information
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- DOI : 10.1246/cl.121259
- ISSN : 0366-7022
- CiNii Articles ID : 10031162175
- CiNii Books ID : AA00603318