Journal
ORGANIC LETTERS
Volume 15, Issue 12, Pages 3138-3141Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol401249e
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Funding
- National Natural Science Foundation of China [21172115, 20972076]
- Natural Science Foundation of Tianjin [10JCYBJC04000]
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The first phosphine-catalyzed [4 + 2] annulation of gamma-substituted allenoates with 2-arylidene-1H-indene-1,3(2H)-diones is disclosed. In the reaction, the gamma-substituted allenoate serves as a new type of 1,4-dipolar synthon; this broadens the application of gamma-substituted allenoates. This method also offers a powerful approach to the construction of highly substituted spiro[4.5]dec-6-ene skeletons in excellent yields, and with complete regioselectivity and high diastereoselectivity.
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