还原
丙酮 → 2-丙醇：查看反应物、产物、反应条件与来源依据，探索相关转化和合成路径。
- 试剂
- NaBH4
- 条件
- 适宜的水性或醇类介质；随后进行水性后处理
- 反应类别
- 还原
- 方程式
- CH3COCH3 + 2[H] -> CH3CH(OH)CH3
概览
丙酮还原为 2-丙醇。
转化
- 方程式
- CH3COCH3 + 2[H] -> CH3CH(OH)CH3
- 试剂
- NaBH4
- 反应环境
- 适宜的水性或醇类介质；随后进行水性后处理
- 反应类别
- 还原
- 机理
- hydride addition to carbonyl
- Evidence level
- source-backed molecular example
参考步骤
Residual carbonyl assessment after propanone reduction
Worked-up reduction sample: compare residual propanone with an alcohol reference
物料与用量
- Worked-up product sample
- Propanone positive control
- Prepared Brady’s reagent
仪器装置
- Spotting tile
- Separate sample and reference pipettes
实验步骤
- Test a separate, fully worked-up aliquot alongside the propanone control.
- Allow the reference observation period: propanone can form its yellow precipitate slowly.
后处理与分离
- Use complementary infrared evidence for carbonyl loss and alcohol formation when assessing conversion.
关键控制条件
- Record the negative precipitation response and analyse the propan-2-ol product.
- Never apply the acidic test reagent directly to an active hydride mixture.
- Use prepared reagent; do not dry or retain reagent residues.
实验技术
Infrared evidence for functional-group change
Use functional-group absorptions and the fingerprint pattern to test a proposed transformation.
装置设置
- Check sample identity, background and axis units before assigning absorptions.
- Compare the starting material and product: oxidation may introduce C=O while removing an alcohol O–H feature.
操作检查
- Water, solvent and unreacted substrate can contribute bands.
- A carbonyl band alone does not distinguish every aldehyde, ketone, acid and ester. Use reference data and complementary evidence; no simulated trace is a measurement.
底物范围
- 适用范围
- Named propanone example.
- 来源说明
- [H] 表示还原当量而非氢气；具体条件有所不同，此记录未给出实验用量或产率。
相关反应
- Oxidation: Propan-2-ol → Propanone
2-丙醇氧化为丙酮。
- Hydration: Propene → Propan-2-ol
丙烯通过水合生成 2-丙醇。
- Hydrolysis: 2-Bromopropane → Propan-2-ol
以碳氧键替代碳溴键，生成 2-丙醇。中间碳仍为仲碳，因此后续氧化可生成丙酮。
参考文献
- Reduction of aldehydes and ketonesJim Clark · Chemguide · 2015
2026-09-08 核对。用于具体分子实例和一般反应范围；未提供制备操作规程或产率保证。
- Brady’s test for aldehydes and ketonesRoyal Society of Chemistry · RSC Education
Propanone carbonyl test with a slower yellow precipitate.
- Infrared spectroscopy: introductionRoyal Society of Chemistry · RSC Education
Molecular vibrations, functional-group absorptions and fingerprint comparison; no fabricated sample spectra.