Keywords: Torquoselectivity.png en torquoselectivity Frontier A J ; Collison C 2005 The Nazarov cyclization in organic synthesis Recent advances Tetrahedron 61 7577 doi DOI 10 1016/j tet 2005 05 019 selfmade by mdlevin 2011-01-23 PD Cc-zero Nazarov reaction |