Triphenylphosphine → HCID 86659286, compound

(3aR,4R,6aS)-2-Benzyloctahydrocyclopenta[c]pyrrol-4-ol (3.00 g, 13.81 mmol, Example 706, Step 1) and triphenylphosphine (4.35 g, 16.57 mmol) were combined in toluene (69 mL). Diisopropyl azodicarboxylate (3.49 g, 17.26 mmol) was added dropwise via addition funnel to the reaction solution at 5° C. Diphenylphosphoryl azide (4.56 g, 16.57 mmol) was then added to the reaction solution. The reaction was allowed to proceed at room temperature for 16 hours and then quenched with saturated aqueous sodium bicarbonate (100 mL). The resulting layers were separated and the product containing phase was extracted with 1.2 M hydrochloric acid (2×40 mL). The acid layer was extracted with ethyl acetate (50 mL) and then basified with 1.9 M potassium hydroxide (68 mL). The aqueous solution was extracted with methyl tert-butyl ether (2×50 mL). The methyl tert-butyl ether was removed under reduced pressure by co-distillation with ethanol and then filtered to provide (3aR,4S,6aS)-4-azido-2-benzyloctahydrocyclopenta-[c]pyrrole in ethanol.

1. customquenched with saturated aqueous sodium bicarbonate (100 mL)
2. customThe resulting layers were separated
3. additionthe product containing phase
4. extractionwas extracted with 1.2 M hydrochloric acid (2×40 mL)
5. extractionThe acid layer was extracted with ethyl acetate (50 mL)
6. extractionThe aqueous solution was extracted with methyl tert-butyl ether (2×50 mL)
7. customThe methyl tert-butyl ether was removed under reduced pressure by co-distillation with ethanol
8. filtrationfiltered

ORD record

ord-416ddb4d378f41f0a5df43f263ab9485

Source dataset

uspto-grants-2014_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08691865B2