Boron Trichloride Mediated Regioselective Claisen Rearrangement of Resorcinol Derivatives: Application to Resorcinol Carvonyl Ethers
作者:Takuya Kumamoto、Fumihiro Ito、Keiko Fusegi、Tsutomu Ishikawa
DOI:10.1055/s-2007-983712
日期:2007.6
Claisen rearrangement (CR) of resorcinol allyl ethers was examined. Although thermal CR gave low regioselectivity, the selectivity was much improved in the presence of a Lewis acid such as boron trichloride. This rearrangement was successfully applied to resorcinol carvonyl ethers for the regioselective introduction of a carvone unit into the resorcinol skeleton for the synthesis of phytoestrogenic
检测了间苯二酚烯丙基醚的克莱森重排 (CR)。尽管热 CR 的区域选择性较低,但在路易斯酸(如三氯化硼)存在下,选择性得到了很大改善。这种重排成功地应用于间苯二酚香芹酮醚,用于将香芹酮单元区域选择性地引入间苯二酚骨架,以合成植物雌激素微雌激素。