Intramolecular Cycloaddition Reactions of 1-Alkenyl-3,4,5-triaryl-1,2-diphosphacyclopenta-2,4-dienes
作者:Almaz A. Zagidullin、Vasili A. Miluykov、Dmitry B. Krivolapov、Sergey V. Kharlamov、Shamil K. Latypov、Oleg G. Sinyashin、Evamarie Hey-Hawkins
DOI:10.1002/ejoc.201100615
日期:2011.7.14
alkylation of sodium 3,4,5-triaryl-1,2-diphosphacyclopentadienide with Br(CH2)nCH=CH2 undergo, depending on the n value, either an intermolecular Diels–Alder reaction leading to polymeric compounds (n = 1, 4) or intramolecularcycloadditionreactions to give tricyclic cage phosphanes with high regio- and stereoselectivity (n = 2, 3). The structures and conformational behavior of these new tricyclic phosphanes