Multi-step reaction with 7 steps
1.1: oxalyl dichloride / dichloromethane; dimethyl sulfoxide / 0.42 h / -78 °C / Inert atmosphere
1.2: 0.33 h / Inert atmosphere
2.1: carbon tetrabromide; triphenylphosphine / dichloromethane / -15 °C / Inert atmosphere
3.1: n-butyllithium / tetrahydrofuran; hexane / 1.75 h / -78 - 20 °C / Inert atmosphere
3.2: 0.5 h / -78 °C / Inert atmosphere
4.1: copper(l) iodide / tetrahydrofuran; diethyl ether / 0.5 h / -15 °C / Inert atmosphere
4.2: 0.5 h / -78 °C / Inert atmosphere
5.1: diisobutylaluminium hydride / dichloromethane; toluene / 0.5 h / -15 °C / Inert atmosphere
6.1: 2,4,6-trimethyl-pyridine; methanesulfonyl chloride; lithium chloride / N,N-dimethyl-formamide / 2 h / 0 °C / Inert atmosphere
7.1: tert.-butyl lithium / diethyl ether; pentane / 0.5 h / -78 °C / Inert atmosphere
7.2: 0.25 h / -78 °C / Inert atmosphere
7.3: 1 h / 0 °C / Inert atmosphere
With
2,4,6-trimethyl-pyridine; copper(l) iodide; n-butyllithium; oxalyl dichloride; carbon tetrabromide; tert.-butyl lithium; diisobutylaluminium hydride; methanesulfonyl chloride; triphenylphosphine; lithium chloride;
In
tetrahydrofuran; diethyl ether; hexane; dichloromethane; dimethyl sulfoxide; N,N-dimethyl-formamide; toluene; pentane;
1.1: |Swern Oxidation / 2.1: |Corey-Fuchs Alkyne Synthesis / 7.3: |Negishi Coupling;
DOI:10.1016/j.tetasy.2013.07.002