HCID 18345115, compound → HCID 53919477, compound

Temperature

-10 °C

To a solution of methyl (+−)-trans-4-methylene-2-(3-thienyl)cyclopentanoate (6.0 g, 27 mmol) prepared as in Step B in THF (70 mL) under nitrogen and cooled to −10° C. was added dropwise over 15 min 1M lithium aluminum hydride (LAH) in THF (54 mL). After 1 h, the bath was removed and the reaction was stirred at rt for 3 h. The reaction was cooled in an ice/methanol bath and the excess LAH was quenched by dropwise addition of water/1N potassium hydroxide/water and the salts were removed by filtration through celite. The filtrate was then poured into dilute aq. HCl. The mixture was extracted twice with ether and the organic layers were washed with brine, dried over sodium sulfate, combined and concentrated to afford the crude title product (4.09 g).

1. customthe bath was removed
2. temperatureThe reaction was cooled in an ice/methanol bath
3. customthe excess LAH was quenched by dropwise addition of water/1N potassium hydroxide/water
4. customthe salts were removed by filtration through celite
5. additionThe filtrate was then poured into dilute aq. HCl
6. extractionThe mixture was extracted twice with ether
7. washthe organic layers were washed with brine
8. dry with materialdried over sodium sulfate
9. concentrationconcentrated

ORD record

ord-a6231eaf85f140fdb9c1ad5ee3ab3a4c

Source dataset

uspto-grants-2003_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06538002B1