[1]TetrahedronLetters,1994,vol.35,p.4611-4614
[2]Patent:WO2009/145816,2009,A2
[1]TetrahedronLetters,1994,vol.35,p.4611-4614
[1]Tetrahedron,2005,vol.61,p.11244-11252
[1]Tetrahedron,2005,vol.61,p.11244-11252
[1]TetrahedronLetters,1994,vol.35,p.4611-4614
[2]Patent:WO2009/145816,2009,A2