1998年11月
Asymmetric synthesis of helical poly(quinoxaline-2,3-diyl)s by palladium-mediated polymerization of 1,2-diisocyanobenzenes: Effective control of the screw-sense by a binaphthyl group at the chain-end
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
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- 巻
- 120
- 号
- 46
- 開始ページ
- 11880
- 終了ページ
- 11893
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/ja982500m
- 出版者・発行元
- AMER CHEMICAL SOC
Aromatizing polymerization of 1,2-diisocyanobenzene derivatives was mediated by optically active organopalladium(II) complexes bearing 1,1'-binaphth-2-yl groups to give optically active poly(quinoxaline-2,3-diyl)s with varying screw-sense selectivities, which crucially depended upon the substituents on the binaphthyl groups. The most effective catalyst, which has 7'-methoxy-1,1'-binaphthyl group, induced the formation of a single screw-sense. Isolation and structural analyses (single-crystal X-ray diffraction and H-1 NMR spectroscopy) of intermediary [oligo(quinoxalinyl)]palladium complexes revealed that the screw-sense selection in the polymerization may be decisively governed by the diastereomeric ratios of the (terquinoxalinyl)-palladium(II) complex intermediate.
- リンク情報
- ID情報
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- DOI : 10.1021/ja982500m
- ISSN : 0002-7863
- CiNii Articles ID : 80010837172
- Web of Science ID : WOS:000077210900007