European Journal of Organic Chemistry p. 103 - 107 (2020)
Update date:2022-08-05
Topics:
Chen, Wei-Lun
Wang, Lee-Ya
Li, Yu-Jang
The oxidative cyclization of amino alcohols by osmium tetroxide/NMO or tetrapropylammonium perruthenate (TPAP)/NMO was found to provide an N,O-acetal moiety through the trapping of the resulting iminium ion by the alcohol. These two transformations were demonstrated in the synthesis of indolizidines (–)-223AB and 3-epi-(–)-223AB.
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