反応 #67270

反応方程式

5-bromo-2-hydroxybenzaldehyde

(R)-glycidyltosylate

K2CO3

→

crude title compound

収率 91.2%

5-BROMO-2-[(2R)-OXIRAN-2-YLMETHOXY]BENZALDEHYDE

収率 91.2%

溶媒

DMF

反応条件

後処理

1. 1
   その他Preparation
2. 2
   洗浄The combined organic phases were washed with LiCl (5%, 100 ml), HCl (1 N, 100 ml), brine (100 ml)
3. 3
   その他were evaporated to dryness
4. 4
   その他The residue was purified by flash column chromatography (isooctane/EtOAc)

実験手順

Preparation according to Preparation 1 using 5-bromo-2-hydroxybenzaldehyde (6 g, 29 mmol), (R)-glycidyltosylate (6.7 g, 29 mmol), K2CO3 (4.9 g, 35 mmol) and DMF (12 ml). The combined organic phases were washed with LiCl (5%, 100 ml), HCl (1 N, 100 ml), brine (100 ml) and were evaporated to dryness. The residue was purified by flash column chromatography (isooctane/EtOAc) to give the crude title compound (6.8 g). MS m/z (rel. intensity, 70 eV) 257 (M+, 38), 256 (M+, 39), 200 (bp), 199 (87), 57 (88).

出典