作为特殊氧化剂： DMSO RCH,OH RCHO 3.硫原子使相邻的碳负离子稳定化（通过p dΠ反馈键) S CH3 S-C-H2 0 O CH3- CH3 CH3—SCH 0 0 碱 CH3- S CH3 CH3- DMSO CH2 0 0 CH3 CH3 CH3- S+ CH3 CH3—S+—CH2 稳定性降低 Organic Chem Organic Chem 作为特殊氧化剂： 3. 硫原子使相邻的碳负离子稳定化（通过p d Π反馈键） S CH3 CH3 S O CH3 CH3 S O O CH3 碱 DMSO S C-H2 CH3 S O C-H2 CH3 S + CH3 CH3 CH3 S O O C-H2 CH3 S + C-H2 CH3 稳定性降低 RCH2 OH DMSO RCHO