p-TsOH in isopropyl alcohol

anhydrous triisopropyl orthoformate; toluene-4-sulfonic acid

1: LDA / tetrahydrofuran / 0.58 h / -90 °C 2: 97 percent / 2,6-lutidine / CH2Cl2 / -40 - -20 °C 3: 98 percent / p-TsOH*H2O; H2O / tetrahydrofuran / 6.5 h / 64 °C 4: 86 percent / LDA; CpTiCl(O-1,2:5,6-di-O-isopropylidene-L-glucofurans-3-O-yl)2 / diethyl ether / 2 h / -78 °C 5: 98 percent / imidazole / dimethylformamide / 2 h / 20 °C 6: 83 percent / H2 / 10percent Pd/C / ethanol / 0.5 h 7: 95 percent / TPAP; NMO / CH2Cl2 / 0.8 h / 20 °C 8: 78 percent / n-BuLi / tetrahydrofuran; hexane / -78 - -5 °C 9: TESOTf; 2,6-lutidine / CH2Cl2 / 3 h / 20 °C 10: 380 mg / EDCI; DMAP / CH2Cl2 / 2 h / 20 °C 11: 78 percent / Cl2(PCy3)Ru(=CHPh)[cyclo(CHNMesCH2CH2NMes)] / toluene / 0.17 h / 110 °C 12: 76 percent / KHMDS / tetrahydrofuran; toluene / -78 - -20 °C 13: 97 percent / HF*pyridine / tetrahydrofuran / 3 h / 20 °C 14: 91 percent / TrisNHNH2; Et3N / 1,2-dichloro-ethane / 7 h / 50 °C View Scheme