5-Heterosubstituted 4-methylene-4,5-dihydroisoxazoles: Ready accessibility and versatile reactivity.

G. Broggini, C. Larosa, G. Zecchi, Synlett, 1995, 1208.

Key Words:
4,5-DIHYDROISOXAZOLES/ALLENES/1,3-DIPOLAR CYCLOADDITIONS/HETEROCYCLIC SPIROCOMPOUNDS/1,3-DIPOLAR CYCLO-ADDITIONS/NITRILE OXIDES/3,5-DICHLORO-2,4,6-TRIMETHYLBENZONITRILE OXIDE/SUBSTITUTED ALLENES/CYCLOADDITIONS/1,1-DIFLUOROALLENE/REARRANGEMENT/4,5-DIHYDROISOXAZOLES/CYCLOADDUCTS



Intramolecular reactions of nitrilimines as a fruitful source of heterocycles.

G. Broggini, G. Molteni, G. Zecchi, Heterocycles, 1998, 47, 541.

Key Words:
1,3-DIPOLAR CYCLO-ADDITIONS/NITRILE IMINE CYCLOADDITIONS/BASE-PROMOTED CYCLIZATION/BEARING ALKENYL GROUPS/STEREOCHEMICAL ASPECTS/RING/DIARYLNITRILIMINES/CONSTRUCTION/CHLORIDES/OXIDES



Pyrrolizidine and indolizidine syntheses involving 1,3-dipolar cycloadditions.

G. Broggini, G. Zecchi, Synthesis, 1999, 905.

Key Words:
pyrrolizidines/indolizidines/1,3-dipolar cycloadditions/intramolecular cycloadditions/pentatomic heterocycles ring opening/FUNCTIONALIZED CYCLIC NITRONES/TANDEM INTER <4/NONSTABILIZED AZOMETHINE YLIDES/OXIME-OLEFIN CYCLOADDITION/GEPHYROTOXIN RING-SYSTEM/4+1 PYRROLINE ANNULATION/FORMAL TOTAL SYNTHESIS/ALPHA-AMINO-ACIDS/X=Y-ZH SYSTEMS/ENANTIOSELECTIVE SYNTHESIS