sulfuric acid; acetic anhydride T=30°C; var. temperature and acidity; substituent effects; Rate constantMechanism;

1 h; Ambient temperature;

<b>Multi-step reaction with 2 steps<br /> </b>1: 36 percent Spectr_. / nitrogen dioxide / CDCl₃ / -60 &deg;C<br />2: 55 percent Spectr_. / 0.75 h / -40 &deg;C<br /> <br /> &nbsp;