Directed regio- and stereoselective hydroformylation of mono- and 1,3-disubstituted allylic alcohols: a catalytic approach to the anti-aldol-retronElectronic supplementary information (ESI) available: experimental. See http://www.rsc.org/suppdata/cc/b3/b311378g/
作者:Bernhard Breit、Peter Demel、Antje Gebert
DOI:10.1039/b311378g
日期:——
Regioselective and diastereoselective hydroformylation of mono- and 1,3-disubstituted allylic alcohol o-DPPB esters is described. The products represent synthetically important anti-aldol retrons.
Tandem-Directed Regioselective Hydroformylation/β-Elimination: A Practical Method for the Synthesis of Enals
作者:Bernhard Breit、Achim Bruch、Antje Gebert
DOI:10.1055/s-2008-1067140
日期:2008.7
A practical synthesis of α,β-unsaturated aldehydes by a tandem-directed hydroformylation/β -elimination process of allylic o-DPPB esters is reported. The o-DPPB group served as an effective controller for regioselectivity of the hydroformylation towards the desired aldolate isomer, and was subsequently eliminated in situ by mild standard bases. The reaction is rather general for the preparation of
Combining Palladium and Chiral Organocatalysis for the Enantioselective Deconjugative Allylation of Enals via Dienamine Intermediates
作者:Guang Hu、Stacey E. Brenner-Moyer
DOI:10.1021/acs.joc.1c02591
日期:2022.1.7
underwent this transformation in high yield and ee, and products can be readily transformed into γ-allyl enals via a Cope rearrangement without erosion of ee. This transformation was used to install the quaternary stereocenter in (S)-bakuchiol, enabling completion of a concise formal synthesis.
报道了 enals 的催化对映选择性去共轭烯丙基化。多种烯醛在高产率和ee上经历了这种转变,并且产物可以通过Cope重排容易地转化为γ-烯丙基烯醛,而不会侵蚀ee。该转换用于在 ( S )-补骨脂酚中安装四元立体中心,从而能够完成简明的正式合成。
ULLRICH, F. -W.;ROTSCHEIDT, K.;BREITMAIER, E., CHEM. BER., 1986, 119, N 5, 1737-1744