255731-96-5

Basic information

• Product Name: 6,8-diphenyl-2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine
• Synonyms: 6,8-diphenyl-2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine
• CAS NO: 255731-96-5
• Molecular Weight: 343.469
• Mol File: 255731-96-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 6,8-diphenyl-2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine(CAS DataBase Reference)
• NIST Chemistry Reference: 6,8-diphenyl-2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine(255731-96-5)
• EPA Substance Registry System: 6,8-diphenyl-2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine(255731-96-5)

Safety Data

• Hazardous Substances Data: 255731-96-5(Hazardous Substances Data)

Upstream product

• 57772-49-3 2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine 
• 134-20-3 2-carbomethoxyaniline 
• 15833-00-8 o-aminophenyldimethylcarbinol 

Relevant articles and documents

Synthesis and characterization of poly(1,3-phenylene)-based polyradicals carrying cyclic aminoxyls

The synthesis and magnetic properties of poly(2,2,4,4-tetramethyl-N-yloxy-1,4-dihydro-2H-3,1-benzoxazine-6,8- diyl-1,3-phenylene) (4) are described. Polyradical 4 was prepared by the Pd-catalyzed cross-coupling reaction of 6,8-dibromo-2,2,4,4-tetramethyl-1,4-dihydro-2H-3,1-benzoxazine and bis(trimethylene) 1,3-phenylenediboronate, followed by oxidation with m-chloroperoxybenzoic acid. The number average molecular weights of 4 determined by SEC (size exclusion chromatography) were ～4120 (15 repeating units), and the spin concentrations determined by EPR were up to 0.75 spin per repeating unit. The EPR spectrum of 4 in a toluene glass matrix showed the ΔMs=2 forbidden transition at g=4.0. A Curie plot of the ΔMs=2 signal intensity vs. 1/T gave a straight line, suggesting that the polyradical is in a triplet ground state or a nearly degenerate singlet-triplet state.