作者:Pierfrancesco Bravo、Massimo Frigerio、Taizo Ono、Walter Panzeri、Cristina Pesenti、Akiko Sekine、Fiorenza Viani
DOI:10.1002/(sici)1099-0690(200004)2000:8<1387::aid-ejoc1387>3.0.co;2-g
日期:2000.4
The synthesis of enantiomerically and diastereomerically pure (−)-(1R,2R,5R)- and (−)-(1R,2S,5R)-2-fluoro frontalin (7) starting from (+)-(1S)-menthyl-(R)-toluene-4-sulfinate, methylmagnesium bromide, methyl fluoroacetate, 4-pentenyl bromide and diazomethane is described. The absolute stereochemistry was unambiguously determined by X-ray analysis of (+)-(1S,2R,5S,RS)-5, an intermediate in the synthesis
以 (+)-(1S)-薄荷基为原料合成对映体和非对映体纯的 (-)-(1R,2R,5R)- 和 (-)-(1R,2S,5R)-2-fluorofrontalin (7)描述了-(R)-甲苯-4-亚磺酸盐、甲基溴化镁、氟乙酸甲酯、4-戊烯基溴和重氮甲烷。通过 (+)-(1S,2R,5S,RS)-5 的 X 射线分析明确确定绝对立体化学,这是合成对映体 (+)-(1S,2R,5S)-2- 的中间体氟前蛋白 (7)。