1.1: 91 percent / imidazole / dimethylformamide / 20 °C 2.1: 64 percent / iPrNEt / CH2Cl2 / 96 h / 20 °C 3.1: 20 percent / NBS; benzoyl peroxide / CCl4 / 1 h / 70 °C 4.1: LDA / tetrahydrofuran; toluene; hexane / 2 h / -78 °C 4.2: tetrahydrofuran; toluene; hexane / 3 h / -78 - 0 °C 5.1: 13.0 mg / HF; pyridine / acetonitrile / 0.67 h / -30 °C 6.1: tetrabutylammonium fluoride / tetrahydrofuran / 20 °C 7.1: 55 percent / SnCl4 / CH2Cl2 / 1 h / 0 °C 8.1: splG; DTT; KCl / (S)-adenosylmethionine / various solvent(s) / 12 h / 4 °C View Scheme