作者:Wojciech Dmowski、Krystyna Piasecka-Maciejewska
DOI:10.1016/s0022-1139(00)00242-6
日期:2000.7
xylic acid (1) with sulphur tetrafluoride gave initially, (1R)-3-(fluoroformyl)camphor (2) and (1R)-2,2-difluoro-3-(fluoroformyl)bornane (3) but after prolonged reaction time, a mixture of endo- and exo-(1R)-3-(trifluoromethyl)camphor (4) was obtained, albeit in low yield. Carboxylic groups in (1S)-ketopinic and (1R)-trans-isoketopinic acids (5) and (9) were found to be resistant towards SF4 such that
内-和外-(1R)-3-樟脑羧酸(1)的混合物先用四氟化硫处理,得到(1R)-3-(氟甲酰基)樟脑丸(2)和(1R)-2,2-二氟-3-(fluoroformyl)莰烷(3),但延长反应时间后,混合物内切-和外切(1R)-3-(三氟甲基)樟脑( - 4)在低的产率得到,虽然。发现(1S)-酮酸和(1R)-反-异烟酸(5)和(9)中的羧基对SF 4具有抗性,因此在环境温度下仅对应的酰基氟(得到了6)和(10),但是在强制条件下碳环羰基发生氟化,分别得到(1S)-2,2-二氟-1-氟甲酰基-7,7-二甲基双环[2,2,1]庚烷(7)和(1R)-2,2-二氟-反-7-氟甲酰基-1,7-二甲基双环[2,2,1]庚烷(11)。7和11的水解产生相应的酸8和12。