193225-88-6Relevant academic research and scientific papers
Metallation of bicymantrenyl and synthesis of polycymantrenyls
Ginzburg,Suprunovich,Dolgushin,Yanovsky,Vorontsov,Sokolov
, p. 165 - 175 (1997)
Bicymantrenyl, η5,η5-C10H8[Mn(CO)3]2 (1), may be metallated at the Cp-ring with BuLi (THF, -60°C) to give monolithium (2) and polylithium derivatives. Metallation of 1 proceeds concurrently on both α-and β-positions, the β-substitution product being predominant. A number of derivatives of 1 with substituents R = D, COOH, CHO, PPh2 have been synthesized in the reactions of monolithium derivative 2 with different electrophiles (D2O, CO2, DMFA, Ph2PCl respectively). Under the action of CuCl2 the oxidative coupling of 2 proceeds to give tetracymantrenyl (11a). Oxidative coupling of a mixture of 2 with cymantrenyllithium affords two isomers of tricymantrenyl (12a, 12b). The structures of 11a, 12a, 12b were established by an X-ray study.
