Multi-step reaction with 5 steps
1.1: 1H-imidazole / N,N-dimethyl-formamide / 3 h / 20 °C
2.1: 2,3-dicyano-5,6-dichloro-p-benzoquinone / dichloromethane / 20 °C / pH 7 / phosphate buffer; Cooling with ice
3.1: 1H-imidazole; iodine; triphenylphosphine / tetrahydrofuran / 0 - 20 °C
4.1: n-butyllithium; diisopropylamine / tetrahydrofuran; N,N,N,N,N,N-hexamethylphosphoric triamide; hexane / 1.25 h / -78 - 0 °C
4.2: 10.25 h / -78 - -40 °C
5.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 3 h / 20 - 50 °C
With
1H-imidazole; n-butyllithium; tetrabutyl ammonium fluoride; iodine; diisopropylamine; triphenylphosphine; 2,3-dicyano-5,6-dichloro-p-benzoquinone;
In
tetrahydrofuran; N,N,N,N,N,N-hexamethylphosphoric triamide; hexane; dichloromethane; N,N-dimethyl-formamide;
DOI:10.1021/ol2013439