Palladium-catalyzed synthesis of 1,3,4-alkatrien-2-yldihydrofurans from 2,3-allenylacetylacetates and propargylic carbonates and their application to synthesize polysubstituted dihydrofurylcyclopentenones
作者:Wei Shu、Shengming Ma
DOI:10.1016/j.tet.2010.02.030
日期:2010.4
and regioselective palladium(0)-catalyzed coupling–cyclization reaction of 2-(2′,3′-allenyl)acetylacetates with propargylic carbonates was reported. The reaction proceeded smoothly under neutral conditions, affording the O-attacked five-membered products with a 1,3,4-trienyl substituent exclusively in good to excellent yields. The products can be efficiently applied to the synthesis of polysubstituted
报道了一种通过高化学和区域选择性钯(0)催化2-(2',3'-烯基)乙酰乙酸与炔丙基碳酸酯的偶合-环化反应生产1,3,4-烷基三烯-2-基二氢呋喃的有效途径。反应在中性条件下顺利进行,得到具有1,3,4-三烯基取代基的O-攻击的五元产物,收率很高,而且收率极好。该产品可在环境条件下通过催化Pauson-Khand反应有效地用于合成多取代的2-(二氢呋喃基)环戊烯酮衍生物。