Ethyl bromoacetate → HCID 54389077, compound

To a solution of benzyl cyanide (11.7 g, 100 mmol) in anhydrous THF (100 mL) was added slowly the solution of LiHMDS in THF (1 M, 200 mL, 200 mmol) at −78° C. in a dry-ice/acetone bath. After addition, the mixture was warmed to rt, stirred for 1 h, cooled to −78° C., and added ethyl bromoacetate (32.9 g, 198 mmol) dropwise. After addition, the reaction mixture was stirred at rt overnight. When TLC showed that the benzyl cyanaide was consumed, the reaction mixture was quenched with satd aq NH4Cl (150 mL), and extracted with EtOAc (3×150 mL). The combined organic layers were washed with satd aq NaHCO3 (150 mL) and brine (150 mL), dried over Na2SO4, and concentrated to give the crude final product, which was purified by chromatography on a silica gel column eluted with PE/EtOAc=50:1-10:1 to give diethyl 3-cyano-3-phenylpentanedioate (10.6 g, yield 37%) as brown oil. 1H NMR (CDCl3 400 MHz): δ 7.45 (d, 2H), 7.37 (t, 2H), 7.28 (t, 1H), 4.06 (q, 4H), 3.2 (m, 4H), 1.12 (t, 6H).

1. additionAfter addition
2. temperaturecooled to −78° C.
3. additionAfter addition
4. stirringthe reaction mixture was stirred at rt overnight
5. customwas consumed
6. customthe reaction mixture was quenched with satd aq NH4Cl (150 mL)
7. extractionextracted with EtOAc (3×150 mL)
8. washThe combined organic layers were washed with satd aq NaHCO3 (150 mL) and brine (150 mL)
9. dry with materialdried over Na2SO4
10. concentrationconcentrated
11. customto give the crude final product, which
12. customwas purified by chromatography on a silica gel column
13. washeluted with PE/EtOAc=50:1-10:1

ORD record

ord-8387c0c2c6114accbb67ddd9aedcb201

Source dataset

uspto-grants-2015_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09163012B2