Kovalev, B. G.; Matveeva, E. D.; Stan, V. V.; Vovk, G. A.; Yudin, L. G.; Kost, A. N.
Journal of Organic Chemistry USSR (English Translation), 1980 , vol. 16, # 10 p. 1728 - 1733
Zhurnal Organicheskoi Khimii, 1980 , vol. 16, # 10 p. 2032 - 2038
in tetrahydrofuran under Ar atm. U complex and (Et3NH)(BPh4) in THF were stirred for 2 h at20°C; soln. was filtered and evapd. to dryness, residue was dissolved in THF and evapd. in vacuo (repeated three times); elem. anal.;
