The First Synthesis of Some Spiro[2,3-Dihydro-2,2-Dimethylbenzofuran-3,1'-Cyclopropanes] through, Mo(CO)6 Catalyzed, One Pot Claisen Rearrangement-Cyclization Reaction of 2-Cyclopropylidene-Aryloxy Alkanes
The First Synthesis of Some Spiro[2,3-Dihydro-2,2-Dimethylbenzofuran-3,1'-Cyclopropanes] through, Mo(CO)6 Catalyzed, One Pot Claisen Rearrangement-Cyclization Reaction of 2-Cyclopropylidene-Aryloxy Alkanes
The First Facile Synthesis of Some 1,2a,3,8b-Tetrahydro-2H-Cyclobuta[c] Chromenes Through Intramolecular Alkylation of an Aromatic Ring by a Cyclobutanone
作者:Angela M. Bernard、Costantino Floris、Angelo Frongia、Pier P. Piras
DOI:10.1055/s-2002-25355
日期:——
Starting from cyclobutanones several new chromenes containing a cyclobutane ring are prepared. Ring fission of these derivatives gives easy access to functionalized 3-isoflavenes.
Palladium (0) Catalyzed Nucleophilic Substitution On 2-Cyclopropylidene-phenoxy Ethanes
作者:Angela M. Bernard、Pier P. Piras
DOI:10.1080/00397919708004192
日期:1997.3
2-cyclopropylidene-phenoxy ethanes 5, 2-substituted with alkyl, aryl or heterocyclic groups are readily obtained in high yields by the Wittig reaction of the easily accessible a-phenoxy etanones 4 with (3-bromo propyl) triphenylphosphonium bromide. They react with complete regioselectivity in palladium (0) catalyzed nucleophilic substitutions with a series of soft carbon nucleophiles giving an easy entry to 5,6-methanoamino acids.