Water → 1-(2-(3-azidopropyl)-5-(5-chloro-2-methylphenyl)-2-phenyl-1,3,4-oxadiazol-3(2H)-yl)-2,2-dimethylpropan-1-one

To a solution of N′-(4-azido-1-phenylbutylidene)-5-chloro-2-methyl benzohydrazide (100 mg, 0.28 mmol) in pyridine (1 mL) was added pivaloyl chloride (70 μL, 0.56 mmol). After stirring at room temperature for 16 hours the heterogeneous mixture was treated with water (10 mL) and extracted with EtOAc (3×10 mL). The combined organic phases were washed successively with 10% NaHSO4 (2×10 mL), NaHCO3 (10 mL) and brine (10 mL) then dried over Na2SO4 and concentrated. The residue was purified by preparative TLC (9:1 hexanes/EtOAc) to afford the product (62 mg, 50%) as a colorless oil.

1. extractionextracted with EtOAc (3×10 mL)
2. washThe combined organic phases were washed successively with 10% NaHSO4 (2×10 mL), NaHCO3 (10 mL) and brine (10 mL)
3. dry with materialthen dried over Na2SO4
4. concentrationconcentrated
5. customThe residue was purified by preparative TLC (9:1 hexanes/EtOAc)

ORD-Eintrag

ord-19d697e6f48842deab433961ff483b25

Quelldatensatz

uspto-grants-2011_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07956073B2