Tandem aldehyde-alkyne-amine coupling/cycloisomerization: A new synthesis of coumarins.
作者： Maddi Sridhar Reddy , Nuligonda Thirupathi , Madala Haribabu
DOI: 10.3762/BJOC.9.21
关键词:
摘要: Cu-catalyzed A(3) coupling of ethoxyacetylene, pyrrolidine and salicylaldehydes led to a concomitant cycloisomerization followed by hydrolysis the resultant vinyl ether afford coumarins in cascade process. The reaction proceeded through exclusive 6-endo-dig cyclization is compatible with halo keto groups giving good moderate yields.
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