Page 1. SYNTHETIC COMMUNICATIONS, 23( 14), 20 19-2025 (1993) ... The synthetic sequence is shown in Scheme 1. Scheme 1 ... Chan, C. -C.; Huang, X. Synthesis, 452 (1982). Bandgar, B. P.; Jagdale, MH; Mane, R. B.; Salunkhe, M. M. Indian J. Chem. 1985, a, 1057. ...