Regioselective synthesis of flavone derivatives via DMAP-catalyzed cyclization of o-alkynoylphenols
作者:Masahito Yoshida、Yuta Fujino、Koya Saito、Takayuki Doi
DOI:10.1016/j.tet.2011.09.063
日期:2011.12
A catalytic amount of DMAP promoted cyclization of o-alkynoylphenols via a 6-endo cyclization mode leading to flavone derivatives in high yields without forming 5-exo cyclized aurone derivatives. Utilizing this method, methoxy substituted flavone and alkyl substituted γ-benzopyranone derivatives were synthesized.
DMAP催化量的促进环化ö -alkynoylphenols经由6-内环化模式,导致高产量黄酮衍生物,而不形成5-外型环化噢哢衍生物。利用这种方法,合成了甲氧基取代的黄酮和烷基取代的γ-苯并吡喃酮衍生物。