Toward (+)-pancratistatin: Modulation of mechanism in an intramolecular electrophilic aromatic substitution
作者:Timothy J. Doyle、Donald VanDerveer、John Haseltine
DOI:10.1016/0040-4039(95)01248-g
日期:1995.8
Triflation of the allylic alcohol of a piperonylated conduritol (4) induces intramolecular electrophilic alkylation of the piperonyl aromatic ring. The regiochemistry of attack relative to the tethering element (ortho vs. ipso) and therefore the distribution of products are controlled by the identity of an arene substituent (Z in 4). Advanced intermediates for the synthesis of anticancer agent (+)-pancratistatin are obtained.