Quest for higher ladderanes: oligomerization of a cyclobutadiene derivative

Mehta, Goverdhan ; Balaji Viswanath, M. ; Narahari Sastry, G. ; Jemmis, Eluvathingal D. ; Sivakumar, D. ; Reddy, K. ; Kunwar, Ajit C. (1992) Quest for higher ladderanes: oligomerization of a cyclobutadiene derivative Angewandte Chemie International Edition, 31 (11). pp. 1488-1490. ISSN 1433-7851

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/anie.19...

Related URL: http://dx.doi.org/10.1002/anie.199214881

Abstract

Successive [4 + 2] cycloadditions of dimethyl 1,2-cyclobutadienedicarboxylate (1), first with itself and then with the next highest adducts 2 and 3, result in the [7]-ladderane 4. The [n]-ladderanes 2-4 are of interest because of their weak σ framework and the very different polarities of the two sides of the molecule. R = CO2Me.

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