S. Rozen et al, Tetrahedron, 41(7), 1111-1153, (1985). |
J. Welch, Tetrahedron, 43(14), 3123-3197, (1987). |
S. T. Purrington et al, Tetrahedron Letters, 27(24), 2715-2716, (1986). |
T. Umemoto et al, Tetrahedron Letters, 27(37), 4465-4468, (1986). |
E. Differding, Tetrahedron Letters, 29(47), 6087-6090, (1988). |
C. C. Bodurow et al, Tetrahedron Letters, 30(18), 2321-2324, (1989). |
S. T. Purrington et al 52 J. Org. Chem., 4307-4310, (1987). |
D. W. Brooks et al, Angew. Chem. Int. Ed. Engl., 19(1), 72-74, (1979). |
T. S. Mansour, Synthetic Communications, 19(3&4), 659-665, (1989). |