反应详情

To a stirred and cooled (-5°/0° C.) solution of 5.4 parts of thiophene in 21.3 parts of 1,1'-oxybisethane were added portionwise 43.5 parts of a solution of n. butyllithium in hexanes 1.6M. After stirring for 20 min. at 0° C., there was added a solution of 5 parts of intermediate 16, namely 6-quinolinecarboxaldehyde, in 71.2 parts of tetrahydrofuran. Stirring at 0° C. was continued for 1 hour and then the reaction mixture was poured into 200 parts of ice-water. The product was extracted with 1, 1'-oxybisethane and the extract was dried, filtered and evaporated. The residue was purified by column chromatography (silica gel; CH2C12 /CH3OH 95:5). The eluent of the desired fraction was evaporated, yielding 2.4 parts (31.1%) of α-(2-thienyl)-6-quinolinemethanol (interm. 17).

1. additionwere added portionwise 43.5 parts of a solution of n
2. stirringAfter stirring for 20 min. at 0° C.
3. stirringStirring at 0° C.
4. extractionThe product was extracted with 1, 1'-oxybisethane
5. customthe extract was dried
6. filtrationfiltered
7. customevaporated
8. customThe residue was purified by column chromatography (silica gel
9. customThe eluent of the desired fraction was evaporated