CDCl 3 ): d = 7, H NMR (300 MHz, pp.6025900328-3 ,
CDCl 3 ): d = 170 ,
1-methyl-1H-pyr- azole-4-carboxylic acid ethyl ester (9m) Yield: 67%, white solid, pp.117-121 ,
71 (t, 1H, J HH = 1.5 Hz, CH PhI ), H NMR (300 MHz LCMS (EI): m/z = 303, pp.61354-61356 ,
oxazolidin-2-one (11p) Yield: 95%, brown solid, mp: 138?140 °C; 1 H NMR (300 MHz, CDCl 3 ): d = 7, CH PhI, vol.65, issue.4, pp.3148-3150 ,
CDCl 3 ): d = 7, MHz, vol.191, issue.1, pp.35270429-35270432 ,
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