A Facile Stereocontrolled Synthesis of <i>anti</i>-α-(Trifluoromethyl)-β-amino Alcohols
作者:G. K. Surya Prakash、Mihirbaran Mandal、Stefan Schweizer、Nicos A. Petasis、George A. Olah
DOI:10.1021/ol000195f
日期:2000.10.1
[GRAPHICS]A short stereocontrolled preparation of anti-alpha-(trifluoromethyl)-beta-amino alcohols is described, involving an initial CF3 transfer to cinnamaldehyde and a one-step, three-component condensation of 3,3,3-trifluorolactic aldehyde, an alkenyl (aryl) boronic acid, and an amine. Applying this methodology to chiral 3,3,3-trifluorolactic aldehyde allowed us to generate an amino alcohol enantioselectively in 92% ee.
enzymatic route for the synthesis of L-fucoseanalogs modified at the nonpolar terminus is reported. In particular, fucose derivatives bearing extended linear (1b) and branched (1e) saturated, or various unsaturated (1c, 1d) aliphatic chains have been prepared, in order to increase hydrophobic contacts. The rather general approach involves a sequential application of the recombinant enzymes L-fuculose 1-phosphate