A novel case of cationic rearrangement involving a phenonium ion
作者:Timothy J. Doyle、Martin Hendrix、John Haseltine
DOI:10.1016/s0040-4039(00)74390-5
日期:1994.11
A cationic rearrangement was observed in the intramolecular electrophilic substitution of a trioxygenated benzyl ether. The crystal structure of the product is presented.
在三氧化苄基醚的分子内亲电取代中观察到阳离子重排。介绍了产品的晶体结构。
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.