With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.20532-33-6,5-Chlorobenzothiophene,as a common compound, the synthetic route is as follows.
PREPARATION 20 Preparation of 5-chloro-2-(4-hydroxy-N-t-butoxycarbonylpiperidin-4-yl)benzo[b]thiophene A solution of 5-chlorobenzo[b]thiophene (0.600 g, 3.56 mmol) in freshly distilled tetrahydrofuran (20 ml) was treated with n-butyllithium (1.2M, 2.94 ml, 3.56 mmol) under nitrogen atmosphere at -78 C. The anion was allowed to stir for 60 minutes, and then was treated with a solution of N-t-butoxycarbonyl-4-piperidone (0.779 g, 3.91 mmol) in tetrahydrofuran (5.0 ml) and allowed to warm to 0 C. The reaction was quenched with sat. sodium bicarbonate, diluted with hexanes/diethyl ether (1:1), separated, the organic phase washed with brine and dried over sodium sulfate. Flash chromatography (silica gel, toluene/ethyl acetate 9:1) gave 1.09 g of a colorless foam which was contaminated with 20% unreacted piperidone. FDMS m/e=367., 20532-33-6
As the paragraph descriping shows that 20532-33-6 is playing an increasingly important role.
Reference£º
Patent; Eli Lilly and Company; US5576321; (1996); A;,
Benzothiophene – Wikipedia
Benzothiophene | C8H6S – PubChem