Ring Expansion – Formation of Optically Active 3-Hydroxypiperidines from Pyrrolidinemethanol Derivatives
作者:Janine Cossy、Cécile Dumas、Domingo Gomez Pardo
DOI:10.1002/(sici)1099-0690(199907)1999:7<1693::aid-ejoc1693>3.0.co;2-j
日期:1999.7
Treatment of pyrrolidinemethanol derivatives (–)-1, (–)-6, (–)-7, 8, (–)-9, (+)-10, (–)-11, and (–)-21 with trifluoroacetic anhydride and then with Et3N afforded, after hydrolysis of the trifluoroacetyl group with NaOH, the optically active 3-hydroxypiperidines (–)-14, (+)-15, (–)-16, 17, (+)-18, (–)-19, (–)-20, and (+)-22, respectively. The yields are good and the enantiomeric excess excellent (up
用三氟乙酸处理吡咯烷甲醇衍生物 (–)-1、(–)-6、(–)-7、8、(–)-9、(+)-10、(–)-11 和 (–)-21酸酐,然后用 Et3N,在三氟乙酰基用 NaOH 水解后,得到旋光 3-羟基哌啶 (-)-14, (+)-15, (-)-16, 17, (+)-18, (- )-19、(–)-20 和 (+)-22 分别。产率良好,对映体过量非常好(高达 95%)。