Multi-step reaction with 6 steps
1.1: sodium hydroxide; N-benzyl-N,N,N-triethylammonium chloride / dichloromethane / 0 - 20 °C
2.1: lithium diisopropyl amide / hexane; tetrahydrofuran / 0.5 h / -25 °C / Inert atmosphere
2.2: -25 - 10 °C / Inert atmosphere
3.1: tetrabutyl ammonium fluoride / tetrahydrofuran / 23 h / Inert atmosphere; Reflux
4.1: n-butyllithium / hexane; tetrahydrofuran / 1.25 h / 0 - 20 °C / Inert atmosphere
4.2: 0.02 h / -12 - 18 °C / Inert atmosphere
4.3: 20 h / 95 °C / Inert atmosphere
5.1: 2-tert-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2-diazaphosphorine / N,N-dimethyl-formamide / 1 h / 20 °C
5.2: 20 °C
6.1: sodium hydroxide / tetrahydrofuran; water; methanol / 4 h / 20 °C
With
n-butyllithium; tetrabutyl ammonium fluoride; N-benzyl-N,N,N-triethylammonium chloride; 2-tert-butylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2-diazaphosphorine; sodium hydroxide; lithium diisopropyl amide;
In
tetrahydrofuran; methanol; hexane; dichloromethane; water; N,N-dimethyl-formamide;
DOI:10.1016/j.bmc.2013.08.025