Burger; Mosettig Journal of the American Chemical Society, 1937 , vol. 59, p. 1302,1306 Show Details Fieser; Johnson Journal of the American Chemical Society, 1939 , vol. 61, p. 168,170 Show Details Bachmann; Struve Journal of Organic Chemistry, 1939 , vol. 4, p. 456,459 Journal of Organic Chemistry, 1940 , vol. 5, p. 416,425