Jayarajan RamasamyPostdoc
Publikationer
I urval från Stockholms universitets publikationsdatabas
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Organocatalytic Synthesis of α‐Trifluoromethyl Allylboronic Acids by Enantioselective 1,2-Borotropic Migration
2020. Sybrand Jonker (et al.). Journal of the American Chemical Society 142 (51), 21254-21259
ArtikelChiral α-substituted allylboronic acids were synthesized by asymmetric homologation of alkenylboronic acids using CF3/TMS-diazomethanes in the presence of BINOL catalyst and ethanol. The chiral α-substituted allylboronic acids were reacted with aldehydes or oxidized to alcohols in situ with a high degree of chirality transfer. The oxygen-sensitive allylboronic acids can be purified via their isolated diaminonaphthalene (DanH)-protected derivatives. The highly reactive purified allylboronic acids reacted in a self-catalyzed reaction at room temperature with ketones, imines, and indoles to give congested trifluoromethylated homoallylic alcohols/amines with up to three contiguous stereocenters.
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