Excellent Chiral Introduction by Diene Iron-Tricarbonyl Moiety. III: Asymmetric Synthesis of Hydroxyethylidene Dipeptide Isostere Using a Diastereoselective 1,2-Nucleophilic Addition of Organocerium Reagents into a 1-Azatriene Fe(CO)3 Complex.
作者:Yoshiji TAKEMOTO、Jun TAKEUCHI、Eiki MATSUI、Chuzo IWATA
DOI:10.1248/cpb.44.948
日期:——
A 1-iminobutadiene-iron tricarbonyl [Fe(CO)3] complex (1) reacts with various organometallic nucleophiles in a stereoselective manner, and especially, by use of organocerium reagents, only single secondary amine complexes (2) were obtained in good yields. Application of this methodology was demonstrated in the asymmetric synthesis of hydroxyethylidene dipeptide isostere from the chiral starting material N-(2R)-(2E)-tricarbonyl[2-5-η-2, 4-pentadienylidene]iron} benzylamine (1b).
1-iminobutadiene-iron tricarbonyl [Fe(CO)3]复合物(1)以立体选择性的方式与各种有机金属亲核物发生反应,特别是通过使用有机铈试剂,只获得了单仲胺复合物(2),而且产率很高。这种方法在以手性起始材料 N-(2R)-(2E)-三羰基[2-5-η-2, 4-戊二烯亚基]铁}苄胺(1b)为原料不对称合成羟基亚乙基二肽异构体中得到了验证。