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-f0809a83739a492ba0641f94c82731d2

Quelldatensatz

uspto-grants-2012_08

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08236825B2