An Allenic Pauson−Khand-Type Reaction: A Reversal in π-Bond Selectivity and the Formation of Seven-Membered Rings
摘要:
[GRAPHICS]Treatment of alkynyl allenes with [Rh(CO)(2)Cl](2) results in a formal [2 + 2 + 1] cycloaddition reaction. This reaction occurs with complete regioselectivity for a variety of substrates affording only 4-alkylidene cyclopentenones in good yields. Moreover, seven-membered rings have been prepared in high yields.
Rhodium(I)-Catalyzed Cycloisomerization
Reaction of Yne-Allenamides: An Approach to Cyclic Enamides
作者:Kay Brummond、Bingli Yan
DOI:10.1055/s-2008-1078169
日期:——
In this paper, we demonstrate a successful conversion of alkynyl allenamides to triene-containing heterocycles via a rhodium(I)-catalyzed cycloisomerization reaction.