تفاعل #647348

معادلة التفاعل

4-(2-hydroxy-ethyl)-cyclohexanone

diisopropylethylamine

tri-isopropylsilyl trifluoromethane sulfonate

→

4-(2-triisopropylsilanyloxy-ethyl)-cyclohexanone

المذيبات

CH2Cl2

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةThe reaction mixture was warmed to 0 EC for 1 h
2. 2
   أخرىpurified by chromatography on SiO2

الإجراء التجريبي

A solution of 4-(2-hydroxy-ethyl)-cyclohexanone (Intermediate R10, 6.8 g, 52.6 mmol, (obtainable as described in the publication by Ciufolini et. al. J. Amer. Chem. Soc. 1991, 113, 8016) was dissolved in CH2Cl2 (75 mL) and treated with diisopropylethylamine (9.2 mL, 52.6 mmol) followed by tri-isopropylsilyl trifluoromethane sulfonate (TIPSTf) (15.3 g, 50.2 mmol) at −30 EC. The reaction mixture was warmed to 0 EC for 1 h. The mixture was subjected to an aqueous work-up and purified by chromatography on SiO2 to give 4-(2-triisopropylsilanyloxy-ethyl)-cyclohexanone (Intermediate R11, 11.8 g (82%). Intermediate R11 was converted via Intermediate R12 to the unsaturated aldehyde, 5-(2-triisopropylsilanyloxy-ethyl)-cyclohex-1-enecarbaldehyde (Intermediate R13)

المصدر