1141498-04-5Relevant articles and documents
Synthesis of trans-2-Substituted Cyclopropylamines from α-Chloroaldehydes
West, Michael S.,Mills, L. Reginald,McDonald, Tyler R.,Lee, Jessica B.,Ensan, Deeba,Rousseaux, Sophie A. L.
, p. 8409 - 8413 (2019)
Cyclopropylamines are prevalent in pharmaceuticals and agrochemicals. Herein, we report the synthesis of trans-2-substituted cyclopropylamines in high diastereoselectivity from readily available α-chloroaldehydes. The reaction proceeds via trapping of an electrophilic zinc homoenolate with an amine followed by ring closure to generate the cyclopropylamine. We have also observed that cyclopropylamine cis/trans-isomerization occurs in the presence of zinc halide salts and that this process can be turned off by the addition of a polar aprotic cosolvent.