An allenic Pauson-Khand-type reaction: a reversal in pi-bond selectivity and the formation of seven-membered rings |
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| Authors: | Brummond Kay M Chen Hongfeng Fisher Kimberly D Kerekes Angela D Rickards Brenden Sill Peter C Geib Steven J |
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| Institution: | Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA. kbrummond@pitt.edu |
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| Abstract: | reaction: see text] 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. |
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