HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1448266Generated: November 2, 2026
Sodium Chloride → 4-Tetrahydropyranyloxy-2-(6-carbethoxyhexyl)cyclopent-2-en-1-one
https://huagongshe.com/reaction/1448266
Participants
| Role | Name | HCID | Charge |
|---|
| Reactant | Sodium Chloride | HCID 5234 | — |
| Reactant | 3,4-dihydro-2H-pyran | HCID 8080 | — |
| Reactant | Sodium Bicarbonate | HCID 516892 | — |
| Reactant | p-Toluenesulfonic acid monohydrate | HCID 521998 | — |
| Reactant | 7-(3-Hydroxy-5-oxo-1-cyclopentenyl)-heptanoic acid ethyl ester | HCID 9837941 | — |
| Solvent | Methanol | HCID 887 | — |
| Solvent | Diethyl Ether | HCID 3283 | — |
| Solvent | Dichloromethane | HCID 6344 | — |
| Product | 4-Tetrahydropyranyloxy-2-(6-carbethoxyhexyl)cyclopent-2-en-1-one | HCID 13189515 | — |
Reaction Steps
To a stirred solution of 674 mg. (2.64 mmoles) of 4-hydroxy-2-(6-carbethoxyhexyl)cyclopent-2-en-1-one (Example 1302) and 2.22 g. (26.4 mmoles) of dihydropyran in 2.6 ml. of methylene chloride is added 5.0 mg. (0.026 mmoles) of p-toluenesulfonic acid monohydrate. After stirring for 20 minutes at room temperature the solution is diluted with ether and poured into saturated sodium chloride solution containing a little sodium bicarbonate. The organic phase is separated and washed with saturated sodium chloride solution. The extract is dried over magnesium sulfate, and volatile matter is evaporated at reduced pressure to give an oil, λmax.MeOH =224 mμ(7950); max. = 1735 (ester carbonyl group), 1710 (ketone carbonyl group), and 1030 cm-1 (tetrahydropyran-yloxy group).
Provenance & Evidence
| DOI | 10.6084/m9.figshare.5104873.v1 |
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| Patent number | US04179574 |
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| Source dataset | uspto-grants-1979_12 |
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| ORD ID | ord-975ce9991e254902bbc950c4d063611f |
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| Source note | uspto-grants-1979_12 |
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