The H-ene pathway has not been detected for the bismuth(III) chloride-
catalyzed Mukaiyama-aldol reaction involving silyl enol ethers and ald
ehydes. The silatropic ene-like process is the only mechanism observed
, even with the weakly reactive 1-(trimethylsilyloxy) cyclohexene. How
ever, trimerization of an aliphatic aldehyde can occur.