79418-71-6Relevant articles and documents
Construction of Pentacyclic Lamellarin Skeleton via Grob Reaction: Application to Total Synthesis of Lamellarins H and D
Manjappa, Kiran B.,Lin, Jhih-Min,Yang, Ding-Yah
, p. 7648 - 7656 (2017)
An efficient construction of phenyl-substituted coumarin-pyrrole-isoquinoline-fused pentacycle via base-promoted Grob-type coupling of 3-nitrocoumarin and papaverine in a sealed tube is reported. This reaction is further applied to the total synthesis of lamellarin H in three linear steps and lamellarin D in eight linear steps with overall yields of 31% and 14%, respectively.
NEW PHARMACEUTICAL COMPOUNDS
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Page/Page column 31, (2008/06/13)
Compounds of formula (I), wherein R1-R4, X, Y and Z are as defined in claims, exhibit COMT enzyme inhibiting activity and are thus useful as COMT inhibitors.