Komissarov, V. N.; Ukhin, L. Yu.; Vetoshkina, L. V. Journal of Organic Chemistry USSR (English Translation), 1990 , vol. 26, # 10.2 p. 1888 - 1890 Zhurnal Organicheskoi Khimii, 1990 , vol. 26, # 10 p. 2188 - 2191