Novel synthesis of pentacarbonylbenzopyranylidenetungsten (0) complexes and their Diels-Alder reaction with electron-rich alkenes

N Iwasawa, M Shido, K Maeyama…

文献索引：Iwasawa; Shido; Maeyama; Kusama Journal of the American Chemical Society, 2000 , vol. 122, # 41 p. 10226 - 10227

全文：HTML全文

被引用次数: 85

摘要

It is known that terminal alkynes and carbonyl complexes of low valent group 6 metals such as M (CO) 5 ‚L (M) Cr, Mo, W; L) THF, Et3N, etc.) are in equilibrium with their vinylidene complexes. 1 Although these complexes are expected to have unique characteristics, their use in synthetic reactions has been quite limited. 2, 3 We previously reported the highly efficient W (CO) 5 ‚THF-catalyzed electrocyclization of aromatic enynes via vinylidene ...