T=280°C; im Rohr;

1: Ambient temperature 2: 15 percent / diethyl ether / 1 h / -20 °C 3: 46 percent / α-chloroethyl chloroformate (ACE-Cl) / 1 h / 100 °C View Scheme

1: Ambient temperature 2: 14 percent / diethyl ether / 1 h / -20 °C 3: 65 percent / α-chloroethyl chloroformate (ACE-Cl) / 1 h / 100 °C View Scheme

1: Ambient temperature 2: 54 percent / diethyl ether / 1 h / -20 °C 3: 74 percent / α-chloroethyl chloroformate (ACE-Cl) / 1 h / 100 °C View Scheme

1.1: hydrogenchloride 2.1: diethyl ether / -45 °C 2.2: -78 °C 3.1: 2 h / 120 °C 4.1: acetic acid; zinc / 16 h / 20 °C 5.1: triethylamine / acetonitrile / 5 h / 80 °C / |Inert atmosphere 6.1: dichloromethane / 20 h / 45 °C / |Inert atmosphere; |Cooling with ice 7.1: 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane; potassium fluoride / acetonitrile / 0.17 h / 80 °C / |Sealed tube View Scheme

1.1: hydrogenchloride 2.1: diethyl ether / -45 °C 2.2: -78 °C 3.1: 2 h / 120 °C 4.1: acetic acid; zinc / 16 h / 20 °C 5.1: sodium carbonate / acetonitrile / 2 h / 130 °C View Scheme

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