Diisopropylethylamine → 5-(1,3-oxazol-2-yl)-N3,N3-dipropylisophthalamide

A solution of 3-[(dipropylamino)carbonyl]-5-(1,3-oxazol-2-yl)benzoic acid 38 (120 mg, 0.38 mmol) in methylene chloride (3.8 mL) containing N,N-diisopropylethylamine (132 μL, 0.76 mmol) and HBTU (151 mg, 0.40 mmol) was stirred at room temperature for 0.5 h. To the above solution was added a solution of the orange oil from step 7 (207 mg, 0.57 mmol) in methylene chloride (3.8 mL) containing N,N-diisopropylethylamine (132 μL, 0.76 mmol) and the reaction mixture was stirred at room temperature for 18 h. The reaction mixture was then diluted with additional methylene chloride and washed with saturated sodium bicarbonate and saturated sodium chloride, dried (sodium sulfate), filtered, and concentrated under reduced pressure to yield an oily residue. Purification by flash column chromatography (silica, 90:10 methylene chloride/methanol) gave N1-{(1S,2R)-1-(3,5-difluorobenzyl)-3-[({2-(dimethylamino) methyl]pyridin-4-yl}methyl)amino]-2-hydroxypropyl}-5-(1,3-oxazol-2-yl)-N3,N3-dipropylisophthalamide (178 mg): mp 63–66° C.; ESI MS m/z 663 [M+H]+.

1. stirringthe reaction mixture was stirred at room temperature for 18 h
2. washwashed with saturated sodium bicarbonate and saturated sodium chloride
3. dry with materialdried (sodium sulfate)
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure
6. customto yield an oily residue
7. customPurification by flash column chromatography (silica, 90:10 methylene chloride/methanol)

ORDレコード

ord-c4eb308366ed4e9cab7a5a21a24fa03f

出典データセット

uspto-grants-2007_02

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07176242B2