Reactions of osmapyridinium with terminal alkynes

Reactions of osmapyridinium with terminal alkynes
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锇吡啶鎓与末端炔烃的反应

DOI:
10.1039/c5qo00052a
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发表时间:
2015-04
期刊:
Org. Chem. Front.
影响因子:
--
通讯作者:
Xia Haiping
Xia Haiping
中科院分区:
其他
文献类型:
--
作者:
Hong Guangning;Chen Zhixin;Zhang Hong;Xia Haiping

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通过锇吡啶与HCCCH(OH)R(R = Ph,Et)反应,合成了一种新型的十元锇大环化合物。我们提出这些反应最初是通过炔的配位、[2 + 2]环加成、随后的1,2-氢迁移和最终的还原消除来进行的。与苯乙炔的反应没有得到相应的衍生物,而是得到η4-配位的环戊二烯配合物,它们被认为是由[4 + 2]环加成过程产生的。对η4配位的环戊二烯配合物的相关反应也进行了讨论。
We have synthesized a new type of ten-membered osmacycles by reaction of osmapyridinium with HCCCH(OH)R (R = Ph, Et). We propose that these reactions take place initially by coordination of the alkynes, [2 + 2] cycloaddition, subsequent 1,2-hydrogen migration and a final reductive elimination. The reactions with phenylacetylenes do not afford the corresponding derivatives but rather give η4-coordinated cyclopentadiene complexes, which are proposed to derive from a [4 + 2] cycloaddition process. Related reactions of the η4-coordinated cyclopentadiene complexes are also discussed.
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