Palladium-catalyzed Exchange of Allylic Groups of Ethers and Esters with Active Hydrogen Compounds. II.
作者:Kuniyuki Takahashi、Akihisa Miyake、Go Hata
DOI:10.1246/bcsj.45.230
日期:1972.1
the active hydrogens are bonded in the presence of palladium catalysts. Allyl and substituted-allyl ethers are more reactive than the corresponding carboxylates. In the reactions of methyl and benzyl ethers, it is necessary to add phenol to obtain the exchange products in fairly good yields. Bis(triphenylphosphine) palladium chloride plus sodium phenoxide, palladium acetate plus triphenylphosphine,
烯丙基化合物 (I)、R1–O–R(R=烯丙基,R1=Ph、Me、PhCH2、MeCO)与活性氢化合物如酚、醇、羧酸、伯胺和仲胺和活性氢反应亚甲基化合物,在钯催化剂的存在下,通过 I 的烯丙基与键合活性氢的原子的分子间交换,得到活性氢化合物的烯丙基衍生物。烯丙基和取代的烯丙基醚比相应的羧酸盐更具反应性。在甲基和苄基醚的反应中,需要加入苯酚才能以较好的收率得到交换产物。双(三苯基膦)氯化钯加苯酚钠,乙酸钯加三苯基膦,