The synthesis of non-symmetrical stilbene analogs of trans-resveratrol using the same Pd catalyst in a sequential double-Heck arylation of ethylene
作者:Sabrina M. Nobre、Mauro N. Muniz、Marcus Seferin、Wagner M. da Silva、Adriano L. Monteiro
DOI:10.1002/aoc.1756
日期:2011.4
developed a sequential and selective Pd‐catalyzed double‐Heck arylation of ethylene that results in non‐symmetrical nitro‐stilbene analogs of trans‐resveratrol at excellent yields. A catalytic system consisting of Pd(OAc)2 and P(o‐tolyl)3 permitted us to carry out the two consecutive Heck arylations without losing activity from the first to the second Heck reaction. After the first Heck arylation of ethylene
我们已经开发了一种顺序和选择性的Pd催化的乙烯双Heck芳基化反应,可得到反式白藜芦醇的不对称硝基二苯乙烯类似物,收率很高。由Pd(OAc)2和P(邻甲苯基)3组成的催化体系使我们能够进行两个连续的Heck芳基化反应,而不会损失从第一Heck反应到第二Heck反应的活性。在乙烯的第一Heck芳基化之后,第二Heck芳基化反应不需要分离或额外的催化剂负载。该方案适用于甲基化反式白藜芦醇的合成,总产率为65%。版权所有©2011 John Wiley&Sons,Ltd.