... K. Kariyone; Tetrahedron Lett. (1974), p. 3995. Full Text via CrossRef. (b) Y. Nakao, A. Nakahara; Chem. Lett. (1977), p. 145. ... b) AL Gutman, M. Shapira; J. Chem. Soc., Chem. Commun. (1991), p. 1467. (c) AL Gutman, M. Shapira, A. Boltanski; J. Org. Chem., 57 (1992), p. 1063. 7; Substrates (1a) and (1e) were commercially available (Fluka and Aldrich respectively). All other ...