反应详情

Quantities: compound 41 (5.00 g, 0.016 mol), n-butyllithium (2.5 M, 7.2 ml, 0.018 mol), THF (100 ml). The experimental procedure was as described for compound 36 except that the n-butyllithium was added between −90° C. and −100° C. Acidification of the resultant benzoic acid lithium salt was achieved by boiling with glacial acetic acid. The benzoic acid was crashed out of solution by diluting with a large volume of water, the resultant product was washed with water (until acid-free) and then purified as described for compound 36 to leave an off-white semi-solid.

1. additionwas added between −90° C. and −100° C
2. washthe resultant product was washed with water (until acid-free)
3. custompurified
4. customto leave an off-white semi-solid