N-methylamine,(2) 3-(diphenylphosphinoyl) propanal, and (3) S, &epoxy-&methylheptan-2- one. The final stages of the reconstruction of the 6E double bond were obtained by a Wittig- Homer reaction which was modified for poorly reactive systems." his compound was designed to mimic the C-8 carbonium ion formed during SO cyclization. Its inhibitory activity on various SO cyh was evaluated and compared with the 6 2 isomer which has an ...