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1. СО → СН3ОН → СН2О → СНООН → HCOONa
2. CaC2 → C2H2 → CH3CHO → CH3COOH → CH3COONa
3. СН4 → C2H2 → С6Н6 → C6H5CH3 → C7H5N3O6
4. CH3CHO → CH3COOH → Cl-CH2-COOH → Cl-CH2-COO-CH2-CH3→ NH2-CH2-COO-CH2-CH3
5. С→ СН4 → СН3СІ → СН3ОН → CH3COOCH3