Question

помогите с цепочкой превращений
1.СH3 – CH2OH → CH2 = CH2 → CH3 – CH3 → CH3 – CH2Cl → уксусный альдегид
2. CH3 – CH3 → CH3 – CH2Cl → CH2 = CH2 → HO – CH2 – CH2 – OH