ChemicalBook CAS DataBase List 5,6-Dihydro-2-methyl-2H-pyran

5,6-Dihydro-2-methyl-2H-pyran synthesis

11synthesis methods

Product Name:5,6-Dihydro-2-methyl-2H-pyran
CAS Number:55230-25-6
Molecular formula:C6H10O
Molecular Weight:98.14

50-00-0 Synthesis

50-00-0
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$10.00/25g

504-60-9 Synthesis

504-60-9
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$180.00/1ml

55230-25-6
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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