Enantioselective Intramolecular [2 + 2 + 2] Cycloaddition of 1,4-Diene-ynes:  A New Approach to the Construction of Quaternary Carbon Stereocenters

The intramolecular [2 + 2 + 2] cycloaddition of various 1,4-diene-ynes was examined using a chiral rhodium catalyst. In the case of 1,4-diene-ynes with a substituent at the 2-position of the 1,4-diene moiety, tricyclic compounds possessing a strained bicyclo[2.2.1]heptene skeleton with two quaternary carbon stereocenters were obtained in high enantiomeric excess. On the other hand, in the case of 1,4-diene-ynes with no substituent at this position, bicyclic cyclohexa-1,3-dienes with a quaternary carbon stereocenter were obtained probably by carbon−carbon bond cleavage of the reaction intermediate.

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PID https://www.doi.org/10.1021/ja0639160.s001
URL https://figshare.com/articles/dataset/Enantioselective_Intramolecular_2_2_2_Cycloaddition_of_1_4_Diene_ynes_A_New_Approach_to_the_Construction_of_Quaternary_Carbon_Stereocenters/3059824
URL https://figshare.com/articles/Enantioselective_Intramolecular_2_2_2_Cycloaddition_of_1_4_Diene_ynes_A_New_Approach_to_the_Construction_of_Quaternary_Carbon_Stereocenters/3059824
URL http://dx.doi.org/10.1021/ja0639160.s001
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Author Shibata, Takanori
Author Tahara, Yu-ki
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Collected From figshare
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Publication Date 2016-02-29
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Language English
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Source https://science-innovation-policy.openaire.eu/search/dataset?datasetId=r37980778c78::2e3058ab65240c1416dc930d08964293
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Last Updated 16 December 2020, 17:33 (CET)
Created 16 December 2020, 17:33 (CET)