186140-18-1

Upstream product

• 186140-12-5 C₅₀H₃₉N₃O₂P₂ 

Downstream Products

• 186140-20-5 5-(4-Chloro-phenylamino)-4b,6,11-triaza-chrysen-12-one 
• 73565-10-3 6-phenylquinazolino<4,3-b>quinazolin-8(H)-one 
• 73565-13-6 6-(p-tolyl)-8H-quinazolino[4,3-b]quinazolin-8-one 
• 186140-19-2 5-p-Tolylamino-4b,6,11-triaza-chrysen-12-one 
• 73565-11-4 6-(4-methoxy-phenyl)-quinazolino[4,3-b]quinazolin-8-one 

Relevant academic research and scientific papers

Synthetic applications of bis(iminophosphoranes) - Preparation of some derivatives of the 11H-quinazolino[2,3-b]- and quinazolino[4,3-b]quinazoline ring systems

Aza Wittig reaction of bis(iminophosphorane) 3 with two equivalents of aryl isocyanates directly provided the bicyclic guanidines 4. However, 3 undergoes intramolecular aza Wittig reaction on thermal treatment to give the iminophosphorane 6 derived from the 2-(o-azidophenyl)-4(3H)-quinazolinone. Compound 6 reacts with isocyanates, acyl chlorides and carbon disulfide to yield quinazolino[4,3-b]quinazoline derivatives 8a-c, 9a-c, 10, and 11. VCH Verlagsgesellschaft mbH, 1997.