Silver-Catalyzed Asymmetric Desymmetrization of Cyclohexadienones via Van Leusen Pyrrole Synthesis
作者:Mohamed Ahmed Abozeid、Hun Young Kim、Kyungsoo Oh
DOI:10.1021/acs.orglett.2c00240
日期:2022.3.11
catalytic asymmetric desymmetrization of cyclohexadienones was accomplished via Van Leusen pyrrole synthesis in the presence of a chiral silver catalyst. The ready access to chiral-fused pyrrole derivatives is attributed to the identification of a suitable isocyanomethyl sulfone surrogate, NasMIC. The current Ag(I)–chiral phosphino-carboamide ligand system can be extended to the kinetic resolution
在手性银催化剂存在下,通过 Van Leusen 吡咯合成实现了环己二烯酮的催化不对称去对称化。易于获得手性稠合吡咯衍生物归因于合适的异氰基甲基砜替代物 NasMIC 的鉴定。目前的 Ag(I)-手性膦基-碳酰胺配体系统可以扩展到外消旋环己二烯酮的动力学拆分,利用来自 AgSbF 6、手性配体 ( L *)、环己二烯酮和 NasMIC 的手性四元配合物的不同反应性。
Pelter, Andrew; Elgendy, Said M. A., Journal of the Chemical Society. Perkin transactions I, 1993, # 16, p. 1891 - 1896
作者:Pelter, Andrew、Elgendy, Said M. A.
DOI:——
日期:——
Highly Enantioselective Catalytic Conjugate Additions to Cyclohexadienones
作者:Rosalinde Imbos、Mirjan H. G. Brilman、Mauro Pineschi、Ben L. Feringa
DOI:10.1021/ol990707u
日期:1999.8.1
Enantioselective copper phosphoramidite-catalyzed conjugate addition of dialkylzinc reagents (R2Zn) to several 4,4-disubstituted cyctohexadienones was achieved with dr's up to 99/1 and ee's up to 99%.
PELTER, ANDREW;ELGENDY, SAID, TETRAHEDRON LETT., 29,(1988) N 6, 677-680
作者:PELTER, ANDREW、ELGENDY, SAID
DOI:——
日期:——
Phenolic oxidation with (diacetoxyiodo)benzene
作者:Andrew Pelter、Said Elgendy
DOI:10.1016/s0040-4039(00)80182-3
日期:——
(Diacetoxyiodo)benzene oxidises quinols and extended quinols to the corresponding quinones smoothly and in high yield. Excess of the reagent in methanol with monohydric phenols directly yields -quinone ketals, also in good yields. 4-Alkyl and 4-alkoxyphenols give the corresponding 4-alkyl-4-methoxycyclohexadienones and 4-alkoxy-4-methoxycyclohexadienones.