α-Amino Aldehydes as Readily Available Chiral Aldehydes for Rh-Catalyzed Alkyne Hydroacylation
作者:Joel F. Hooper、Sangwon Seo、Fiona R. Truscott、James D. Neuhaus、Michael C. Willis
DOI:10.1021/jacs.5b11892
日期:2016.2.10
stereospecificity. Amino aldehydes derived from glycine, alanine, valine, leucine, phenylalanine, isoleucine, serine, tryptophan, methionine, and cysteine were successfully employed, as was an enantiomerically enriched α-OMTM-aldehyde derived from phenyllactic acid. The synthetic utility of the α-amino enone products is demonstrated in a short enantioselective synthesis of the natural product sphingosine.
容易获得的 α-氨基醛,在氮上结合了一个甲硫基甲基 (MTM) 保护基团,被证明是 Rh 催化的炔烃加氢酰化反应中的有效底物。反应在温和条件下进行,采用小咬角双膦配体,具有良好的官能团耐受性和高立体特异性。成功地使用了源自甘氨酸、丙氨酸、缬氨酸、亮氨酸、苯丙氨酸、异亮氨酸、丝氨酸、色氨酸、甲硫氨酸和半胱氨酸的氨基醛,以及源自苯乳酸的富含对映异构体的 α-OMTM-醛。α-氨基烯酮产物的合成效用在天然产物鞘氨醇的短对映选择性合成中得到证明。