“…An interesting innovation for the synthesis of derivatives of anatoxin has been pr~posed.~' N-methyl-azabicyclo[4,2,1]nonane-2-one (72) was condensed with lithio-trimethylsilyl-1,3dithiane to (73) which upon treatment with butyllithium and methyl iodide gave rise to the thioketal (74). The double bond was introduced by carbonyl umpolong.…”