Multi-step reaction with 9 steps
1.1: 2-(pyrrolidin-1-yl)phenol; MeMgBr / toluene; diethyl ether / 1.5 h / 4 °C
1.2: toluene; diethyl ether / 18 h / 55 °C
2.1: LiHMDS / tetrahydrofuran / 0.5 h / -78 °C
2.2: O2 (gas); (EtO)3P / tetrahydrofuran
3.1: lithium 4,4'-di-tert-butylbiphenyl / tetrahydrofuran / 3 h / -48 °C
4.1: K2CO3 / dimethylformamide / 0.17 h / 60 °C
5.1: t-BuOOH; VO(OEt)3 / CH2Cl2; toluene / 4 h
6.1: Et3N; 4-DMAP / 12 h / 20 °C
7.1: LiHMDS / 1.17 h / -78 - 25 °C
7.2: tetrahydrofuran / 2 h / Heating
8.1: 4-DMAP; imidazole / dimethylformamide / 2 h / 20 °C
9.1: t-BuLi / tetrahydrofuran; pentane / 0.5 h / -78 °C
9.2: 92 mg / tetrahydrofuran; pentane / 0.17 h
With
1H-imidazole; tert.-butylhydroperoxide; dmap; 2-(pyrrolidin-1-yl)phenol; methylmagnesium bromide; tert.-butyl lithium; vanadium(V) oxytriethoxide; lithium 4,4′-di-tert-butylbiphenylide; potassium carbonate; triethylamine; lithium hexamethyldisilazane;
In
tetrahydrofuran; diethyl ether; dichloromethane; N,N-dimethyl-formamide; toluene; pentane;
1.2: Diels-Alder reaction;
DOI:10.1021/ja067083p