Studies of heterocyclic analogues of azulenes. Part 9. Regioselective cycloadditions of 2H-cycloheptathiazol-2-one with acetylenic esters and electron-deficient olefins

Studies of heterocyclic analogues of azulenes. Part 9. Regioselective cycloadditions of 2H-cycloheptathiazol-2-one with acetylenic esters and electron-deficient olefins
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甘菊环杂环类似物的研究。

DOI:
10.1039/p19820002881
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发表时间:
1982
期刊:
Journal of The Chemical Society-perkin Transactions 1
影响因子:
--
通讯作者:
M. Shigematsu
M. Shigematsu
中科院分区:
--
文献类型:
--
作者:
N. Abe;T. Nishiwaki;M. Shigematsu

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2 H-环庚噻唑-2-酮与炔属酯和缺电子烯烃的环加成反应具有区域选择性,通过1,10-偶极环化反应生成2-氧代-3H-1-this-2a-氮杂环戊二烯并[cd]甘菊环和2-氧代-3H-1-this-2a-氮杂环戊二烯并[ef]庚二烯。
Cycloadditions of 2H-cycloheptathiazol-2-one with acetylenic esters and electron-deficient olefins have been found to proceed regioselectively, producing 2-oxo-3H-1-this-2a-azacyclopent[cd]azulenes by 1,10-dipolar cyclisation, and 2-oxo-3H-1-this-2a-azacyclopenta[ef]heptalenes.