Cyclodehydration of cis-2-butene-1,4-diol with active methylene compounds catalyzed by a diphosphinidenecyclobutene-coordinated palladium complex
Cyclodehydration of cis-2-butene-1,4-diol with active methylene compounds catalyzed by a diphosphinidenecyclobutene-coordinated palladium complex
复制标题
DOI：
10.1016/j.jorganchem.2006.03.011
复制
发表时间：
2006-07-01
影响因子：
2.3
通讯作者：
Yoshifuji, Masaaki
中科院分区：
文献类型：
--
作者：
Murakami, Hiromi;Matsui, Yukio;Yoshifuji, Masaaki
（pi-烯丙基）三氟化钯与1,2-二（4-甲氧基苯基）-3,4-二（2,4,6-三-丁基苯基膦烯）环丁烯（DPCB-OMe）， [Pd(eta(3)-C3H5)(DPCB-OMe)]OTf配合，在吡啶存在下，在甲苯中与活性亚甲基化合物如乙酰丙酮和乙酰乙酸乙酯有效催化顺-2-丁烯-1,4-二醇的环脱水。该反应可在空气中进行，产率很高，可以得到2-乙烯基-2,3-二氢呋喃。(c) 2006 Elsevier B.V.版权所有
(pi-Allyl)palladium triflate coordinated with 1,2-bis(4-methoxyphenyl)-3,4-bis(2,4,6-tri-t-butylphenylphosphinidene)cyclobutene (DPCB-OMe), [Pd(eta(3)-C3H5)(DPCB-OMe)]OTf, efficiently catalyzes cycl odehydration of cis-2-butene-1,4-diol with active methylene compounds such as acetylacetone and ethyl acetoacetate in toluene in the presence of pyridine. The reactions can be performed in air, giving 2-vinyl-2,3-dihydrofurans in good to high yields. (c) 2006 Elsevier B.V. All rights reserved.