反应详情

To a solution of (R)-tert-butyl 3-((R)-(3-chlorophenyl)(hydroxy)methyl)piperidine-1-carboxylate (32.5 g, 0.1 mol) in MeCN (325 mL), NaH (12 g, 0.3 mol) was added at 0° C. The mixture was stirred for 1 hr at rt. The mixture was cooled to −40° C., then bromoacetonitrile (35.7 g, 0.3 mol) was added in portions. The mixture was stirred for 0.5 hr at −20° C. After the reaction was complete it was quenched with sat. NH4Cl. The mixture was extracted with CH2Cl2. The organic layer was dried over Na2SO4, concentrated. Crude (R)-tert-butyl 3-((R)-(3-chlorophenyl)(cyanomethoxy)methyl)piperidine-1-carboxylate was used for the next step without further purification.

1. temperatureThe mixture was cooled to −40° C.
2. stirringThe mixture was stirred for 0.5 hr at −20° C
3. customwas quenched with sat. NH4Cl
4. extractionThe mixture was extracted with CH2Cl2
5. dry with materialThe organic layer was dried over Na2SO4
6. concentrationconcentrated
7. customCrude (R)-tert-butyl 3-((R)-(3-chlorophenyl)(cyanomethoxy)methyl)piperidine-1-carboxylate was used for the next step without further purification