| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5227075 | Tetrahedron | 2007 | 11 Pages |
Abstract
The indene formation from phenyl-substituted sec- and tert-propargyl esters (terminal alkynes) was achieved by platinum or ruthenium catalysis via E-vinylcarbenoid intermediate. Considering the competitive reactions of pentannulation versus cyclopropanation, the equilibrium ratios of E and Z vinylcarbenoid intermediates from sec- and tert-propargyl esters are estimated at ca. 10:90 and 40:60, respectively. Two reaction pathways, Nazarov-type cyclization and/or metallacycle from styrylcarbenoid species, are proposed by considering ratios of products in the control experiment.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Yusuke Nakanishi, Koji Miki, Kouichi Ohe,