Organic letters

Ligand-Induced Acceleration of the Intramolecular [3+ 2] Cycloaddition between Alkynes and Alkylidenecyclopropanes

J Durán, M Gulías, L Castedo, JL Mascareñas

文献索引：Duran, Juan; Gulias, Moises; Castedo, Luis; Mascarenas, Jose L. Organic Letters, 2005 , vol. 7, # 25 p. 5693 - 5696

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被引用次数: 38

摘要

Bulky phosphite L6 and several sterically robust phosphoramidites are excellent ligands for promoting the Pd-catalyzed [3+ 2] intramolecular cycloaddition between alkylidenecyclopropanes and alkynes. The use of these ligands allows for low catalyst loadings and facilitates the otherwise sluggish cycloaddition of hept-6- ynylidenecyclopropane systems.