Trityl chloride → tert-butyl (3RS,4RS)-3-hydroxy-4-(4-trityloxymethyl-phenyl)-piperidine-1-carboxylate

A solution of 1.50 g (5.14 mmol) of tert-butyl (3RS,4RS)-3-hydroxy-4-(4-hydroxymethyl-phenyl)-piperidine-1-carboxylate, 1.73 g (6.16 mmol) of triphenylchloromethane and 674 mg (6.68 mmol) of triethylamine in 20 ml of methylene chloride was stirred at room temperature for 5 hours. For the working-up, the reaction mixture was washed with 10 ml of water and 10 ml of saturated sodium hydrogen carbonate solution, the organic phase was dried over sodium sulphate and evaporated under reduced pressure. The crude product was chromatographed on silica gel using a 95:5 mixture of toluene and ethyl acetate as the eluent. There were obtained 2.08 g (77.5% of theory) of tert-butyl (3RS,4RS)-3-hydroxy-4-(4-trityloxymethyl-phenyl)-piperidine-1-carboxylate as a colourless foam; MS: 567 (M+NH4)+.

1. washthe reaction mixture was washed with 10 ml of water and 10 ml of saturated sodium hydrogen carbonate solution
2. dry with materialthe organic phase was dried over sodium sulphate
3. customevaporated under reduced pressure
4. customThe crude product was chromatographed on silica gel using
5. additiona 95:5 mixture of toluene and ethyl acetate as the eluent

ORD-Eintrag

ord-3149e1761fe94e33a681b9f4740cd342

Quelldatensatz

uspto-grants-2000_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US06051712