2-methyl-4-(pyrrolidin-1-ylmethyl)phenol

反応条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: NaB(OAc)3H (11.8 g, 0.056 mol) was added in portions for 15 min to a mixture of pyrrolidine (3.3 mL, 0.041 mol) and 2-methyl-4-hydroxybenzaldehyde (5 g, 0.037 mol) in CH2Cl2 (100 mL) under vigorous stirring and cooling with an ice bath in an atmosphere of argon Ar. The mixture was stirred for 20 h and cooled with an ice bath. Concentrated HCl (10 mL) was added. The organic layer was separated and discarded. The aqueous one was alkalized with K2CO3 to pH 9 (30 mL) and extracted with EtOAc (4×100 mL). The combined extracts were dried with Na2SO4, and evaporated to give the title compound (6.06 g, 86%) was obtained as white crystals. H-NMR (400 MHz)-data (DMSO-d6, J, Hz): 9.18 (br s, 1H, OH); 6.83 (s, 2H, ArH); 3.79 (s, 3H, CH3); 3.44 (s, 2H, CH2Ar); 2.36-2.44 (m, 4H, CH2CH2CH2CH2,); 1.65-1.72 (m, 4H, CH2CH2CH2CH2). cooling with an ice bath in an atmosphere of argon Ar The mixture was stirred for 20 h cooled with an ice bath The organic layer was separated extracted with EtOAc (4×100 mL) The combined extracts were dried with Na2SO4 evaporated