1191422-04-4Relevant articles and documents
A versatile preparation of gelaender-type p-terphenyls from a readily available diacetylenic precursor
Modjewski, Matthew,Lindeman, Sergey V.,Rathore, Rajendra
supporting information; experimental part, p. 4656 - 4659 (2009/12/26)
A series of doubly bridged p-terphenyls (4) have been synthesized utilizing a facile three-step synthesis starting from the readily available dlacetylenlc precursor (1) In excellent overall yields, and their structures were confirmed by 1H/13 NMR spectroscopy as well as by X-ray crystallography. The racemization barrier between the meso and chlral atropisomers of one of the derivatives of 4 was found to be ~12 kcal/mol by variable-temperature NMR spectroscopy. The versatility of the protocol developed herein was further demonstrated by the preparation of a quadruply bridged penta-p-phenylene derivative.
