Nickel-catalysed cycloaddition oligomerisation of 1,6-diynes to medium-size cyclic polyenes
Nickel-catalysed cycloaddition oligomerisation of 1,6-diynes to medium-size cyclic polyenes
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镍催化 1,6-二炔环加成低聚生成中等尺寸环状多烯
DOI:
10.1039/d2py01033j
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发表时间:
2022
影响因子:
4.6
通讯作者:
Sentaro Okamoto
中科院分区:
文献类型:
--
作者:
Yuhsaku Okabe;Takeshi Yamada;Sentaro Okamoto
Nickel complexes having a sterically demanding N,N- or N,N,N-type ligand are demonstrated to catalyse the cycloaddition oligomerisation of 1,6-heptadiynes to produce medium-size cyclic polyenes selectively with narrow molecular dispersity and minimum side reactions. The resulting cyclic polyenes exhibit non-conjugated behaviour on NMR and UV–Vis. absorption analyses. Meanwhile, regio-isomerised cyclic polyenes including trans-disubstituted alkenes, which are generated via thermal isomerisation of the cyclic polyenes at 200 °C, exhibit conjugated behaviour. The present oligomerisation reaction has wide functional group compatibility, enabling the production of medium-size cyclic polyenes bearing various functional groups. A plausible reaction mechanism that accounts for the narrow polydispersity is proposed.
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