1: LiAlH4 / diethyl ether / 3 h / Ambient temperature 2: 55 percent / 2,3-dichloro-5,6-dicyano-1,4-benzoquinone / benzene / 3 h / Heating View Scheme

<b>Multi-step reaction with 3 steps<br /> </b>1: thionyl chloride / Ambient temperature<br />2: 2.) triethylamine / 1.) benzene, reflux; 2.) benzene, 30 min, RT<br />3: 85 percent / methanesulphonic acid / diethyl ether / 1 h / Ambient temperature<br /> <br /> &nbsp;