Pd催化Baylis-Hillman醇的乙酸酯与炔基羧酸的乙酸脱羧烯丙基偶联导致以高度区域和立体选择性的方式形成重要的1,5-二芳基戊-1-烯-4-炔。脱羧偶联仅通过S N 2'途径发生。衍生自丙烯酸烷基酯,乙基乙烯基酮和苯基乙烯基砜的Baylis-Hillman醇的乙酸盐仅提供(E)-1,5-二芳基戊-1-烯-4-炔,而Baylis-Hillman醇的乙酸盐则衍生自丙烯腈专门提供(Z)-1,5-diarylpent-1-en-4-ynes。
Efficient Synthesis of Bisallylic Ethers from Baylis-Hillman Adducts Promoted by Molecular Iodine
作者:Xueshun Jia、Peichao Zhao、Jian Li
DOI:10.1055/s-2008-1042937
日期:2008.4
A straightforward and efficient synthesis of functionalized ethers fromBaylis-Hillman (MBH) adducts was disclosed. In the presence of I 2 , MBH adducts underwent smooth dehydration to give a series of bisallylic symmetrical ethers in moderate to good yields.
公开了从 Baylis-Hillman (MBH) 加合物直接有效地合成官能化醚。在 I 2 存在下,MBH 加合物经历平稳脱水,以中等至良好的产率得到一系列双烯丙基对称醚。