[1]JournalofOrganicChemistry,1991,vol.56,p.5883-5889
[1]BulletindelaSocieteChimiquedeFrance,1997,vol.134,p.713-718
[1]BulletindelaSocieteChimiquedeFrance,1997,vol.134,p.713-718
[1]Tetrahedron,2000,vol.56,p.2665-2672
[1]TetrahedronLetters,2001,vol.42,p.4301-4304