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.