Synthesis of Allenes by Palladium-Catalyzed S<sub>N</sub>2′ Reaction of Indium Organometallics with Propargylic Esters
作者:José Sestelo、Luis Sarandeses、Ricardo Riveiros
DOI:10.1055/s-2007-983849
日期:2007.11
Allenes have been efficiently prepared by the reaction of propargylic esters (benzoates, acetates, carbonates) with triorganoindium compounds (R 3 In) under palladium catalysis, via an 5 N 2' rearrangement. The reaction proceeds smoothly at room temperature with a variety of aryl-, alkenyl-, and alkynylindium reagents. The yields obtained are high and the regioselectivity is complete both in the case
通过炔丙基酯(苯甲酸酯、乙酸酯、碳酸酯)与三有机铟化合物(R 3 In)在钯催化下通过 5 N 2' 重排反应有效地制备了丙二烯。该反应在室温下使用各种芳基、烯基和炔基铟试剂顺利进行。在末端和非末端炔丙基酯的情况下,获得的产率很高并且区域选择性是完全的。