Nwaukwa et al., Tetrahedron Letters, vol. 23, No. 1, 35, (1982). |
Schneider et al., J. Org. Chem., 47, 364, (1982). |
Lee et al., Tetrahedron Letters, No. 20, 1641, (1976). |
Wolfe et al., Chemical Communications, 1420, (1970). |
Stevens et al., J. Org. Chem., 45, 2030, (1980). |
Nwaukwa et al., Tetrahedron Letters, vol. 23, No. 31, 3131, (1982). |
Marshall et al., Synthetic Communications, 9(2), 123, (1979). |
Meyers, J. Org. Chem., vol. 26, 1046, (1961). |
Sawicki, Tetrahedron Letters, vol. 23, No. 22, 2249, (1982). |
Quici et al., J. Org. Chem., vol. 44, No. 19, 3436, (1979). |
Regen, J. Org. Chem., vol. 42, No. 5, 875, (1977). |