Exploiting morph-DAST mediated ring-expansion of substituted cyclic β-amino alcohols for the preparation of cyclic fluorinated amino acids. Synthesis of 5-fluoromethylproline and 5-fluoropipecolic acid
作者:Pavel K. Mykhailiuk、Svetlana V. Shishkina、Oleg V. Shishkin、Olga A. Zaporozhets、Igor V. Komarov
DOI:10.1016/j.tet.2011.02.082
日期:2011.4
of the synthesis is a transformation of the CH2OH-group into the CH2F-one using morpholinosulfur trifluoride. During the synthesis, an efficient procedure to prepare trans- and cis-5-fluoropipecolic acids was elaborated.
脯氨酸类似物在吡咯烷环的第五个位置的轴承的含氟取代基的合成中,外消旋的反式-和顺式-5-氟脯氨酸,进行。合成的关键步骤是使用吗啉代三氟化硫将CH 2 OH-基团转化为CH 2 F-one。在合成过程中,有效的过程,制备反式-和顺-5- fluoropipecolic酸得到阐述。