... 2,753,378 (July 3, 1956). (6) EA Bartkus, E. B. Hotelling, and MB Neuworth, (7) VN Ipatieff, H. Pines, and BS Friedman, J. Am. J. Org. Chem., 22, 1185 (1957). Chem. Soc., 60, 2731 (1938). ... The organic layer was washed with water and azeotropically dried with toluene. ...