Reacción #2661

Ecuación de reacción

(+/-)-cis-4-tert-butyldimethylsilyloxy-2-cyclopentenol

hydrogen

→

title compound

Rendimiento 92.0%

(+/-)-cis-3-tert-butyldimethylsilyloxycyclopentanol

Rendimiento 92.0%

Disolventes

methanol

methanol

Condiciones de reacción

Tratamiento posterior

1. 1
   Filtraciónfilter through diatomaceous earth
2. 2
   Lavadorinse the solids with methanol (50 mL)
3. 3
   ConcentraciónConcentrate the filtrate under vacuum (15 mmHg/40° C.)
4. 4
   Otropurify the residue
5. 5
   workup.DISTILLATIONby Kugelrohr distillation (0.6 mmHg/60°-65° C.)

Procedimiento

Combine (+/-)-cis-4-tert-butyldimethylsilyloxy-2-cyclopentenol (2.50 g, 11.6 mmol, prepared in example 3) and Ni2B (8.5 mL of a 0.14M slurry in methanol, 10 mol %) in methanol (14 mL). Stir the slurry under an atmosphere of hydrogen for 18.5 hours. Then replace the hydrogen atmosphere with nitrogen, filter through diatomaceous earth and rinse the solids with methanol (50 mL). Concentrate the filtrate under vacuum (15 mmHg/40° C.) and purify the residue by Kugelrohr distillation (0.6 mmHg/60°-65° C.) to provide the title compound as a colorless oil (2.31 g, 92%).

Fuente