One-Step Synthesis of Spiropyridines, a Novel Class of C2-Symmetric Chiral Ligands, by Cobalt(I)-Catalyzed [2 + 2 + 2] Cycloadditions between Bis-Alkynenitriles and Alkynes
摘要:
Spiropyridines, a novel series of C-2-symmetric ligands, can be obtained in moderate yields by means of Co(l) catalyzed double cocyclization between bis-alkynenitriles and alkynes. This one-step method allowed the first synthesis of the interesting 7,7'- and 8,8'-spyropyridines from acyclic precursors.
One-Step Synthesis of Spiropyridines, a Novel Class of C2-Symmetric Chiral Ligands, by Cobalt(I)-Catalyzed [2 + 2 + 2] Cycloadditions between Bis-Alkynenitriles and Alkynes
摘要:
Spiropyridines, a novel series of C-2-symmetric ligands, can be obtained in moderate yields by means of Co(l) catalyzed double cocyclization between bis-alkynenitriles and alkynes. This one-step method allowed the first synthesis of the interesting 7,7'- and 8,8'-spyropyridines from acyclic precursors.
One-Step Synthesis of Spiropyridines, a Novel Class of <i>C</i><sub>2</sub>-Symmetric Chiral Ligands, by Cobalt(I)-Catalyzed [2 + 2 + 2] Cycloadditions between Bis-Alkynenitriles and Alkynes
作者:Jesús A. Varela、Luis Castedo、Carlos Saá
DOI:10.1021/ol991195m
日期:1999.12.1
Spiropyridines, a novel series of C-2-symmetric ligands, can be obtained in moderate yields by means of Co(l) catalyzed double cocyclization between bis-alkynenitriles and alkynes. This one-step method allowed the first synthesis of the interesting 7,7'- and 8,8'-spyropyridines from acyclic precursors.