Common Leaving Groups TsO-MsO-NH>1>H2=Br CH>>R Sulfonates are easily pre pared from alcohols in pyridine 0 CH3OH CISR CH3OSR HCI tosylate R= CH: mesylate R=CH 3Common Leaving Groups TsO- = MsO- > NH3 - > I- > H2O- = Br- > Cl- >> F- Sulfonates are easily prepared from alcohols mesylate R = CH 3 CH3 tosylate R = O O CH3OSR + HCl in pyridine O O CH3OH + ClSR