C6H5N(CH3)2 HO3S HOAC (CH3)2 OAc NaoH, NaO3S -N(CH3)2C6H5N(CH3 )2 HOAC HO3 S N + N N(CH3 )2 H OAc - NaO3 S N N N(CH3 ) 2 NaOH