反应详情

To a 3-necked, 1-L round bottomed flask equipped with an overhead stirrer, digital thermometer and 500-mL constant-pressure addition funnel with a nitrogen inlet was added 11 g (0.29 mol) of lithium aluminum hydride and 200 mL of anhydrous THF. The addition funnel was charged with a solution of 40 g (0.2 mol) of methyl 6-hydroxy-2-naphthoate. The flask was cooled in ice/water and the naphthoate slowly added over 1 hour. The suspension was stirred overnight, recooled and cautiously treated with 100 mL of water. The white suspension was poured into 5% (v/v) HCl and extracted several times with ethyl acetate. The combined extracts were washed with water, dried, evaporated and the residue recrystallized in hexane/ethyl acetate to yield a total of 30 g (87%) of the title compound in three crops as beige plates, mp 179-181° C.

1. additiondigital thermometer and 500-mL constant-pressure addition funnel with a nitrogen inlet
2. extractionextracted several times with ethyl acetate
3. washThe combined extracts were washed with water
4. customdried
5. customevaporated
6. customthe residue recrystallized in hexane/ethyl acetate