Enantioselective synthesis of sceptrin (146) by Baran.90 PLE = pig liver esterase, DMT-MM = 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride, TsOH = p-toluenesulfonic acid, DIBAL = diisobutylaluminum hydride, MsCl = methanesulfonyl chloride, DMF = N, N-dimethylformamide, THF = tetrahydrofuran.