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MISCELLANEOUS BENZOHETEROCYCLES Partial reduction of lactone 166 (using for example diisobutylaluminum hydride in the cold) affords lactol 167. Condensation with nitromethane leads to the corresponding alkylated tetrahydrobenzopyran 170. The sequence probably starts by aldol reaction of the hydroxylactone form of the lactol (168) with nitrome thane to give the vinyl nitro intermediate 169 ... [Pg.390]

See other pages where Lactols hydroxylactones is mentioned: [Pg.242] [Pg.1222] [Pg.382] [Pg.454] [Pg.382] [Pg.210] [Pg.108] [Pg.327]

See also in sourсe #XX -- [ Pg.16 , Pg.223 ]

See also in sourсe #XX -- [ Pg.16 , Pg.223 ]