Tandem Michael Addition/Cyclization Reaction of 2,3-Allenoates with Organozincs: Facile Synthesis of Isocoumarins
摘要:
A series of isocoumarin derivatives have been synthesized via the reaction of 2-(o-aimethoxycarbonyl)phenyI)-2,3-allenoates with organozincs in CH2Cl2 at room temperature (for diallrylzinc) or 100 degrees C (for Ph2Zn) through a tandem Michael additionfintramolecular cyclization process.