Photolytic closure of 4,5-diphenyl-oxazol-2-ones to phenanthro[9,10-d]oxazol-2-ones and an improved synthesis of benzoins
作者:Gholamhosein H. Hakimelahi、Charles B. Boyce、Hamid S. Kasmai
DOI:10.1002/hlca.19770600206
日期:1977.3.9
The synthesis of phenathrenes substituted by nitrogen and oxygen atoms in position 9 and 10 by photolysis of 4,5-diphenyl-oxazol-2-ones (cf. Scheme 4) is described. Moreover an improved general procedure for the synthesis of benzoins in aprotic solvent (tetra-t-butylammonium cyanide in DMF/DMSO) is developed.