
%0 Journal Article
%A O'Conner, MJ 
%A Smith, JF 
%A Teo, S 
%T The preparation and mass spectrometric studies of carboxy-substituted oxazoles derived from (S)-serine
%J Australian Journal of Chemistry
%D 1976/02/01
%V 29
%N 2
%P 375-379
%K 
%R https://doi.org/10.1071/CH9760375
%U https://www.publish.csiro.au/paper/CH9760375 
%X The copper(11) complex formed by the reaction of bis((S)-serinato)copper(11) and formaldehyde under alkaline conditions was treated with sodium borohydride to give the sodium salt of dihydro-1 H,3H,5H- oxazolo[3,4-c]oxazole-7a-carboxylic acid. This reaction does not cause appreciable cleavage of the oxazole ring system. The methyl and ethyl esters of the acid were prepared and characterized by gas chromatography/mass spectrometry (g.c.-ms.). Breakdown patterns involving loss of formaldehyde are described. 
