Diisopropylethylamine → (R)-tert-butyl 3-(3-bromo-1-trityl-1H-indazole-5-carboxamido)piperidine-1-carboxylate

2-(7-Aza-1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate (HATU) (3.1 mmol) was added to a suspension of 3-bromo-1-trityl-1H-indazole-5-carboxylic acid (1 g) in DMF (5 mL) and was stirred at room temperature for 15 minutes. A solution of (R)-tert-butyl 3-aminopiperidine-1-carboxylate (415 mg) in DMF (5 mL) was added to the reaction and followed by diisopropyl ethyl amine (DIEA) (0.72 mL). The mixture was stirred at room temperature for an additional 30 minutes. The reaction was quenched with water (50 mL) and extracted with ethyl acetate (3×100 mL). The extracts were combined, dried using anhydrous sodium sulfate, filtered, and concentrated in vacuo. The crude product was progressed to the next step without purification.

1. stirringThe mixture was stirred at room temperature for an additional 30 minutes
2. customThe reaction was quenched with water (50 mL)
3. extractionextracted with ethyl acetate (3×100 mL)
4. customdried
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe crude product was progressed to the next step without purification

ORDレコード

ord-b702b2a310fc4ecaa0a447da840a33d8

出典データセット

uspto-grants-2015_04

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08999957B2