Stereospecific synthesis of 2-amino-3-fluoronitriles. Preparation of β-fluoro-α-amino acids and esters
作者:A.I. Ayi、R. Guedj
DOI:10.1016/s0022-1139(00)85199-4
日期:1984.2
The synthesis of some 2-amino-3-fluoro-nitriles and 2-amino-3-fluoro-acids and their esters have been achieved by means of a Strecker-type reaction. The method involved the action of amines with 3-fluoro-2-hydroxy-nitriles followed by acid solvolysis. The first step has been found to be stereospecific leading to the 2-amino-3-fluoronitriles with inversion of configuration at the carbon atom carrying
Methyl 2-fluorolactates and 3-fluorocyanohydrins were found to give respectively 3-fluoro 1,2-diols and 3-fluoroethanolamine derivatives by direct reduction of carboxylic groups and cyano groups using lithium aluminium hydride in ether solution. Treatment of 3-fluoro-2-tosyloxynitriles with tetra n-butylammonium bromide gives 3-fluoro-2-bromonitriles.