Enzymatic resolution of acylates of prochiral phenolic 1-aryl- and 1-arylalkyl-1,2,3,4-tetrahydroisoquinolinols, which possess a guaiacol-type moiety, by use of immobilized lipase in organic solvent
摘要:
Enzymatic resolution of acylates of prochiral phenolic 1-aryl- and 1-arylalkyl-1,2,3,4-tetrahydroisoquinolinols, which possess a guaiacol-type moiety by use of lipase immobilized with celite in water-saturated organic solvent gave the corresponding acylates and phenols in moderate optical yields.
Acid treatment of o-quinol acetates (2a and 2b) derived from 5-hydroxy-1-benzyltetrahydroisoquinolines (3a and 3b) gave the corresponding 3-hydroxyaporphines (4a and 4b) in high yield.Similarly, the 3-hydroxyhomoaporphines (4c, 4d, and 4e) were excusively synthesized from the corresponding 1-phenethyl o-quinol acetates (2c, 2d, and 2e). On the other hand, no C-noraporphine was formed from the 1-aryl o-quinol acetate (2f); instead, the p-quinone (11) was generated.
Enzymatic resolution of acylates of prochiral phenolic 1-aryl- and 1-arylalkyl-1,2,3,4-tetrahydroisoquinolinols, which possess a guaiacol-type moiety, by use of immobilized lipase in organic solvent
Enzymatic resolution of acylates of prochiral phenolic 1-aryl- and 1-arylalkyl-1,2,3,4-tetrahydroisoquinolinols, which possess a guaiacol-type moiety by use of lipase immobilized with celite in water-saturated organic solvent gave the corresponding acylates and phenols in moderate optical yields.