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。