5,6-Dihydro-2-methyl-2H-pyran synthesis
- Product Name:5,6-Dihydro-2-methyl-2H-pyran
- CAS Number:55230-25-6
- Molecular formula:C6H10O
- Molecular Weight:98.14
Yield:55230-25-6 50.6%
Reaction Conditions:
in tetrahydrofuran at 240; for 6 h;Autoclave;
Steps:
1 Example 1Synthesis of 2-Methyl-5,6-dihydro-2H-pyran (II)
1000ml autoclave; 75g paraformaldehyde, 225g piperylene, 225g tetrahydrofuran, 1.5g hydroquinone;Close the autoclave. Under stirring, heated to 240°C and reacted for 6 hours. Cool to room temperature and withdraw material. Unreacted piperylene and solvent tetrahydrofuran are recovered at normal pressure. Distillation under reduced pressure gave 123.97 g of a colorless liquid; yield 50.6%.
References:
CN104370868,2017,B Location in patent:Paragraph 0021; 0022; 0023
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