1566-76-3Relevant academic research and scientific papers
Efficient preparation of 3-substituted quinazolinediones directly from anthranilic acids and isocyanates
Koay, Natalie,Campeau, Louis-Charles
experimental part, p. 473 - 478 (2011/05/14)
An efficient and practical synthesis of 3-substituted quinazolinediones is described. The protocol uses readily available isocyanates and anthranilic acids as precursors in a one-pot operation and has been demonstrated on >50 g scale. Isolation of the pro
Convenient Preparation of N-substituted 2-Amino-4H-3,1-benzoxazin-4-ones and 3-Substituted 2,4(1H,3H)-Quinazolinediones
Papadopoulos, E. P.,Torres, C. D.
, p. 269 - 272 (2007/10/02)
Room temperature of 2-(3-arylureido)benzoic acids (1) and methyl2-(3-alkyl-, or 3-arylureido)-benzoates (2) with concentrated sulfuric acid leads to N-substituted 2-amino-4H-3,1-benzoxazin-4-ones (3) in generally very good yields.The isomeric 3-substitute
