Diisopropylethylamine → HCID 89690206, compound

To a stirred solution of 3-oxocyclobutanecarboxylic acid (1.1 g) in DMF (50 ml) were added HATU (5.7 g) and N,N-diisopropylethylamine (4.2 ml) at 0° C. The mixture was allowed to warm to room temperature and stirred for 30 min. A solution of 4-bromo-N2-methylbenzene-1,2-diamine (2.0 g) in DMF (2 ml) was added, and the resultant mixture was stirred at the same temperature for 18 h. The mixture was then concentrated in vacuo, and the residue was diluted with DCM (200 ml) and washed with saturated NH4Cl (100 ml), saturated NaHCO3 (60 ml), water (100 ml) and brine (100 ml). The DCM layer was then dried over Na2SO4 and concentrated in vacuo. The residue was purified by silica gel column chromatography (hexane/EtOAc) to give the title compound (2.7 g) as an off-white solid.

1. concentrationThe mixture was then concentrated in vacuo
2. additionthe residue was diluted with DCM (200 ml)
3. washwashed with saturated NH4Cl (100 ml), saturated NaHCO3 (60 ml), water (100 ml) and brine (100 ml)
4. dry with materialThe DCM layer was then dried over Na2SO4
5. concentrationconcentrated in vacuo
6. customThe residue was purified by silica gel column chromatography (hexane/EtOAc)

ORD record

ord-28032141cbea49289ba7b252f08b99a5

Source dataset

uspto-grants-2016_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09365540B2