New synthetic routes to β-fluoro β-phenyllactic acid derivatives and β-fluorocyanohydrins
作者:A.I. Ayi、M. Remli、R. Condom、R. Guedj
DOI:10.1016/s0022-1139(00)82265-4
日期:1981.6
Alkyl phenyl 2,3-epoxycarboxylates from the well-known Darzens glycidic esters synthesis react under very mild conditions with pyridinium-poly-hydrogen fluoride to give corresponding 3-fluoro 3-phenyllactates in almost quantitative yields with a high regio and stereoselectivity.
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