[1]TetrahedronLetters,1995,vol.36,p.1279-1282
[1]JournalofOrganicChemistry,1996,vol.61,p.9309-9322
[2]TetrahedronLetters,1995,vol.36,p.8787-8790
[1]JournalofOrganicChemistry,1995,vol.60,p.6389-6396
[1]JournalofOrganicChemistry,1995,vol.60,p.6389-6396
[1]TetrahedronLetters,1997,vol.38,p.3345-3348