3-(4-羟基苯基)乳酸乙酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The title compound (1.9 g, 17%) was prepared as a gummy liquid from 2-(2,3-dihydro-1,4-benzothiazin-4-yl)ethyl methanesulfonate (8.2 g, 30.0 mmol), potassium carbonate (20.7 g, 150 mmol) and ethyl 2-hydroxy-3-(4-hydroxyphenyl)propanoate (6.3 g, 30.0 mmol) using conditions analogous to that described in preparation 2. that described in preparation 2

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The title compound (0.14 g, 32%) was prepared as a gummy liquid from 2-(2,3-dihydro-1,4-benzoxazin-4-yl)ethyl methanesulfonate (0.36 g, 1.42 mmol), potassium carbonate (0.80 g, 5.8 mmol) and ethyl 2-hydroxy-3-(4-hydroxyphenyl)propanoate (0.3 g, 1.42 mmol) using conditions analogous to that described in preparation 2. that described in preparation 2

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a stirred solution of 0.5 g (2.74 mmol) of D,L 3-(4-hydroxyphenyl) lactic acid hydrate in 10 mL of ethanol was added a catalytic amount of concentrated hydrochloric acid. The mixture was heated at reflux for 2 hours then cooled to room temperature and concentrated under vacuum. The residue was dissolved in 50 mL of ether and washed with saturated aqueous sodium bicarbonate (1×50 mL) and brine (1×50 mL). The organic layer was removed, dried over magnesium sulfate, filtered and evaporated under vacuum to afford 0.54 g (2.57 mmol,94%) of the ethyl ether. 1H NMR (200 MHz,CDCl3): 1.26 (t,7 Hz,3H), 2.86 (dd;7,14 Hz;1H); 3.03 (dd;4,14 Hz; 1H), 4.19 (q,7 Hz,2H), 4.38 (dd;4,7 Hz;1H), 5.60 (br s,1H), 6.66 (d,8 Hz,2H), 7.03 (d,8 Hz,2H). The mixture was heated at reflux for 2 hours concentrated under vacuum The residue was dissolved in 50 mL of ether washed with saturated aqueous sodium bicarbonate (1×50 mL) and brine (1×50 mL) The organic layer was removed dried over magnesium sulfate filtered evaporated under vacuum

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The title compound (1.06 g, 43%) was prepared as a pale yellow liquid from 2-(phenoxazin-10-yl)ethyl methanesulfonate (1.8 g, 5.9 mmol) and ethyl 2-hydroxy-3-(4-hydroxyphenyl)propanoate (1.36 g, 6.49 mmol) by an analogous procedure to that described in example 6 (Method B).

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The title compound (1.9 g, 17%) was prepared as a gummy liquid from 2-(2,3-dihydro-1,4-benzothiazin-4-yl)ethyl methanesulfonate (8.2 g, 30.0 mmol), potassium carbonate (20.7 g, 150 mmol) and ethyl 2-hydroxy-3-(4-hydroxyphenyl)propanoate (6.3 g, 30.0 mmol) using conditions analogous to that described in preparation 2. that described in preparation 2

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The title compound (1.9 g, 17%) was prepared as a gummy liquid from 2-(2,3-dihydro-1,4-benzothiazin-4-yl)ethyl methanesulfonate (8.2 g, 30.0 mmol), potassium carbonate (20.7 g, 150 mmol) and ethyl 2-hydroxy-3-(4-hydroxyphenyl)propanoate (6.3 g, 30.0 mmol) using conditions analogous to that described in preparation 2. that described in preparation 2

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The title compound (0.14 g, 32%) was prepared as a gummy liquid from 2-(2,3-dihydro-1,4-benzoxazin-4-yl)ethyl methanesulfonate (0.36 g, 1.42 mmol), potassium carbonate (0.80 g, 5.8 mmol) and ethyl 2-hydroxy-3-(4-hydroxyphenyl)propanoate (0.3 g, 1.42 mmol) using conditions analogous to that described in preparation 2. that described in preparation 2

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: The title compound (0.14 g, 32%) was prepared as a gummy liquid from 2-(2,3-dihydro-1,4-benzoxazin-4-yl)ethyl methanesulfonate (0.36 g, 1.42 mmol), potassium carbonate (0.80 g, 5.8 mmol) and ethyl 2-hydroxy-3-(4-hydroxyphenyl)propanoate (0.3 g, 1.42 mmol) using conditions analogous to that described in preparation 2. that described in preparation 2

反应条件: temp:0.00; pressure:0.00; stir: