1: palladium diacetate; silver carbonate; dibenzyl hydrogen phosphate / 1,2-dichloro-ethane; tert-butyl alcohol / 2 h / 50 °C / |Inert atmosphere 2: boron trifluoride diethyl etherate / 100 °C View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: 4-(N,N-dimethlyamino)pyridine; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride / dichloromethane / 4 h / 20 &deg;C<br />2: palladium 10 on activated carbon; hydrogen / methanol / 4 h<br />3: triethylamine / toluene / |Reflux; |Dean-Stark<br /> <br /> &nbsp;

<b>Multi-step reaction with 3 steps<br /> </b>1: 2 h / 160 &deg;C<br />2: N,N-dimethyl-formamide / toluene / 2 h / 80 &deg;C<br />3: 2,6-dimethylpyridine / dichloromethane / 20 &deg;C<br /> <br /> &nbsp;