Bredereck et al. Chemische Berichte, 1948 , vol. 81, p. 307,312 Full Text Show Details Wacker; Ebert Zeitschrift fuer Naturforschung, 1959 , vol. 14b, p. 709,711 Full Text Show Details Brookes; Lawley Journal of the Chemical Society, 1960 , p. 539,544