[1] Zhang Z. [J] Chem Bull, 1961, 10: 539 and references cited therein. [2] Fieser LF and Hartwell JL. [J] J Am Chem Soc, 1938, 60: 2555. [3] Fieser LF, Hartwell JL, Jones J E, Wood JH and Bost RW. Organic Synthesis [M]. Coll. Vol. III, New York: John Wiley & Sons, Inc., 1955, 98-100. [4] Meth-Cohn O and Narine B. [J] Tetra Lett, 1978, 19: 2045. [5] Meth-Cohn O, Rhouati S, Tarnowski B and Robinson A. [J] J C S Perkin I, 1981, 1537. |