反应详情

Triethylsilane (32.62 ml) was added in one portion to a stirred solution of ethyl 3-(4-phenylbenzoyl)propanoate [(2), 25.06 g] in trifluoroacetic acid (71.5 ml) and the resulting mixture was stirred at room temperature for about 20 hours. The resulting clear dark orange solution was diluted with water and extracted with ether. The extracts were washed with aqueous sodium bicarbonate (x2) and then water (x2), dried and concentrated to give a mobile brown liquid. Triethylsilane remaining in this liquid was removed by Kugelrohr evaporative distillation at 110° C. and a pressure of ca. 1 mmHg to leave crude ethyl 4-(4-phenylphenyl)butanoate (21.20 g) as a brown oil. (Compare method of C. T. West, S. J. Donnelly, D. A. Kooistra and M. P. Doyle, J. Org. Chem., 1973, 38, 2675).

1. extractionextracted with ether
2. washThe extracts were washed with aqueous sodium bicarbonate (x2)
3. dry with materialwater (x2), dried
4. concentrationconcentrated
5. customto give a mobile brown liquid
6. customTriethylsilane remaining in this liquid was removed by Kugelrohr evaporative distillation at 110° C.