Photolytic closure of 4, 5??diphenyl??oxazol??2??ones to phenanthro [9, 10??d] oxazol??2??ones and an improved synthesis of benzoins

GH Hakimelahi, CB Boyce…

Index: Hakimelahi,G.H. et al. Helvetica Chimica Acta, 1977 , vol. 60, p. 342 - 347

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Citation Number: 19

Abstract

Abstract 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.