were synthesised by application of the cyclisation reaction of β-phenylethyl isocyanate to N-methylisoquinoline lactam with Magic Methyl and the regioselective cleavage reaction of aromatic methoxyl groups with methionine and methanesulphonicacid.
Base-induced cyclization of trimethoxy-o-aroyldiphenylphosphoryl methylbenzamide: a formal synthesis of (±) cherylline and (±) cherylline dimethylether
The trimethoxy-o-aroyldiphenylphosphorylmethylbenzamide 9 can be cyclized by treatment with KHMDS; the procedure has been employed to synthesize (±)Cherylline 1 and its dimethylether 2.