Polyarylated oxazoles

Recently, they also developed another one-pot synthesis of polyarylated oxazoles from benzylamine and benzU derivatives via oxidative dehydrogenation domino process using air as oxidant (Scheme 8.70). The reaction condition is mild and moderate to good yields could be obtained at room temperature. The C(sp )-H... 

Scheme 8.70 Synthesis of polyarylated oxazoles from benzylamine and benzil derivatives.

Kanemitsu and Einami (1990) investigated the role of the polymer on hole transport in a series of 2-(p-dipropylaminophenyl)-4-(p-dimethylaminophenyl)-5-(o-chlorophenyl)-l,3-oxazole (OX) doped polymers. The polymers were a polyarylate (PA), bisphenol-A polycarbonate (PC), poly(methyl methacrylate) (PMMA), poly(styrene) PS, poly(vinyl chloride) (PVC), polyethylene terephthalate) (PET), and poly(vinyl butyral) (PVB). The glass transition temperatures of the polymers range from 322 (PVB) to 448 K (PA). The temporal features of the photocurrent transients were strongly dependent on the polymer. Figure 76 shows the results. The field was 4.0 x H)5 V/cm and the temperature 295 K. The transients were near rectangular for PS, PET, PA, and PMMA, and highly dispersive for PVC land PVB. This was attributed to the fact... 

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See also in sourсe #XX -- [ , ]

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