Samarium(II) Iodide-Mediated Intermolecular Coupling Reactions of N,N-Dibenzylenamides with Carbonyl Compounds and Transformation of the Product, N,N-Dibenzyl-.GAMMA.-hydroxyamide to .DELTA.-Aminoalcohol.
作者:Yutaka AOYAGI、Mikiko MAEDA、Akira MORO、Ken KUBOTA、Yohko FUJII、Haruhiko FUKAYA、Akihiro OHTA
DOI:10.1248/cpb.44.1812
日期:——
Samarium(II) iodide-mediated intermolecular coupling reactions of N, N-dibenzylenamides (1a-d) with carbonyl compounds (2a-i) produced the corresponding N, N-dibenzyl-γ-hydroxyamides (3a-i) in moderate to good yields.Attempts to remove the two benzyl groups of 3a using hydrogenolysis and Birch reduction were unsuccessful. On the other hand, the lithium aluminum hydride reduction of 3a produced 10 in 61% yield, and dedibenzylation using 20% Pd(OH)2 on carbon gave the corresponding δ-aminoalcohol (11).
钐(II)碘化物介导的N,N-二苄基酰胺(1a-d)与羰基化合物(2a-i)的分子间耦合反应产生了相应的N,N-二苄基-γ-羟基酰胺(3a-i),得率中等到良好。尝试通过氢解和Birch还原去除3a的两个苄基未成功。另一方面,3a的锂铝氢还原反应产生了10,得率为61%,而使用20% Pd(OH)2在碳上的去苄基化反应则得到相应的δ-氨基醇(11)。