Title | Synthesis of 3,4-Bis(benzylidene)cyclobutenes |
Publication Type | Journal Article |
Year of Publication | 2011 |
Authors | Parkhurst, R, Swager, T |
Journal | Synlett |
Volume | 2011 |
Pagination | 1519–1522 |
Date Published | jun |
ISSN | 0936-5214 |
Keywords | bisbenzylidenecyclobutene deriv prepn, dibromobisbenzylidenecyclobutene prepn crystal str, diphenyldiyndiol bromination cyclization |
Abstract | The syntheses of several derivs. of 3,4-bis(benzylidene)cyclobutene I-V are reported. Previously unknown 1,2-dibromo-3,4-bis(benzylidene)cyclobuteneIII-V were obtained through in situ generation of 1,6-diphenyl-3,4-dibromo-1,2,4,5-tetraene followed by electrocyclic ring closure. Ensuing redn. and metal-catalyzed cross-coupling provided addnl. derivs. The effects of ring strain on the geometry and electronics of these derivs. were examd. by X-ray crystallog. and 1H NMR spectroscopy, resp. [on SciFinder(R)] |
URL | http://www.thieme-connect.de/DOI/DOI?10.1055/s-0030-1260777 |
DOI | 10.1055/s-0030-1260777 |