Stereoselective Synthesis of <i>a</i><i>nti</i>-α-(Difluoromethyl)-β-amino Alcohols by Boronic Acid Based Three-Component Condensation. Stereoselective Preparation of (2<i>S</i>,3<i>R</i>)-Difluorothreonine
作者:G. K. Surya Prakash、Mihirbaran Mandal、Stefan Schweizer、Nicos A. Petasis、George A. Olah
DOI:10.1021/jo011116w
日期:2002.5.1
3-difluorolactaldehyde, an alkenyl or aryl boronic acid, and an amine, a one-step three-component methodology was developed for the stereoselective preparation of anti-alpha-(difluoromethyl)-beta-amino alcohols. beta-Furyl-substituted anti-alpha-(difluoromethyl)-beta-amino alcohol was further elaborated to form (2S,3R)-difluorothreonine in high yield and ee.
从光学活性的3,3-二氟丙醛,烯基或芳基硼酸和胺开始,开发了一种一步三组分方法,用于立体选择性制备抗α-(二氟甲基)-β-氨基醇。进一步精制了β-呋喃基取代的抗α-(二氟甲基)-β-氨基醇,以高产率和ee生成(2S,3R)-二氟苏氨酸。