Cyclobutane Diolefins. 1,2-Diphenyldimethylenecyclobutane<sup>1,2</sup>

Blomouist, A. T.; Meinwald, Yvonne C.

doi:10.1021/ja01499a036

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2005

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Cited by 6 publications

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“…16 The observed allene dimerization regioselectivity benefits from both pinacol boronate and bulky C 5 Me 5 group nature. A direct access to 4a from phenylallene dimerization catalyzed by 2 gives a mixture of 4a, 4b, and 1,2-diphenyl-3,4-dimethylenecyclobutane 7 17 (in 2:1:3 ratio), showing a lack of regioselectivity (head-tohead versus tail-to-tail coupling) with respect to allenyl boronate 1.…”

Section: 3°mentioning

confidence: 99%

An Opened Route to 1,3-Dimethylenecyclobutanes via Sequential Ruthenium-Catalyzed [2 + 2] Cycloaddition of Allenyl Boronate and Palladium Suzuki Coupling

et al. 2005

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The regioselective head-to-head [2 + 2] cyclodimerization of allenyl boronate catalyzed by the ruthenium catalyst [Cp*RuCl(COD)] leads to a novel diboronated 1,3-dimethylenecyclobutane. Consecutive palladium-catalyzed C-C couplings open a route to novel disubstituted 1,3-dimethylenecyclobutane species. The X-ray crystalline structure of the phenyl-substituted 1,3-dimethylenecyclobutane is provided.

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Section: 3°mentioning

confidence: 99%