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.
作者:Kay M. Brummond、Peter C. Sill、Brenden Rickards、Steven J. Geib
DOI:10.1016/s0040-4039(02)00633-0
日期:2002.5
This manuscript describes a silicon-tethered Pauson–Khandreaction and subsequent cleavage of the resulting vinyl silane to afford functionalized alkylidene cyclopentenones. Altering the reaction conditions affords a selective reaction with either π-bond of the allene.
An Allenic Pauson−Khand-Type Reaction: A Reversal in π-Bond Selectivity and the Formation of Seven-Membered Rings
作者:Kay M. Brummond、Hongfeng Chen、Kimberly D. Fisher、Angela D. Kerekes、Brenden Rickards、Peter C. Sill、Steven J. Geib
DOI:10.1021/ol025955w
日期:2002.5.1
[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.