204 



G. DANGSCHAT, H. O. L. FISCHER VOL. 4 (1950) 



18 After acid hydrolysis following the prescription given in the "gth Communication on Quinic Acid 

 and derivatives" free shikimic acid is obtained: 



its m.p. and m.p. of a 50% mixture 184-185°; [a]^° — — 183° 

 (in water, i dm tube, c = 1.23, ajf = — 2.25°). 

 " The small yield of crystallized substance suggests that the acetyl-isopropylidene-shikimic acid 

 nitrile contains, unlike the corresponding methylene compound, a considerable quantity of a 

 1,2 unsaturated product. 



Received June 23rd, 1949 



