1: 92 percent / TsOH 2: 96 percent / mCPBA 3: 97 percent / CuI 4: 93 percent / i-Pr2NEt 5: H2 / Pd-C 6: 98 percent / pyridine 7: 83 percent / NaN3 8: AcOH, H2O 9: Ph3P / H2O; pyridine View Scheme