259810-97-4Relevant articles and documents
Methyl 3-arylamino-2-benzoylaminopropenoates in the synthesis of 4- arylaminomethylene-2-phenyl-2-oxazolin-5-ones: Unexpected formation of bis- oxazolones
Singh, Manoj K.,Singh, Ram S.,Singh, Radhey M.
, p. 920 - 924 (2007/10/03)
The reaction of methyl 3-arylamino-2-benzoylaminopropenoates 2 with phosphorus oxychloride in pyridine at 70°C for 30 min leads to the unexpected formation of N-aryl-N-bis-(5-oxo-2-phenyl-4, 5- dihydro-oxazol-4- ylmethylene) amines 4. In contrast, 4-aryla