<i>Z</i>-Selective Synthesis of γ,δ-Unsaturated Ketones via Pd-Catalyzed Ring Opening of 2-Alkylenecyclobutanones with Arylboronic Acids
作者:Yao Zhou、Changqing Rao、Qiuling Song
DOI:10.1021/acs.orglett.6b01816
日期:2016.8.19
Pd-catalyzed 1,2-addition (instead of 1,4-addition) of arylboronic acids to 2-alkylenecyclobutanones followed by β-carbon elimination from the resulting palladium cyclobutanolates to afford γ,δ-unsaturated ketones was developed. The desired γ,δ-unsaturated ketones were obtained in good to excellent yields with Z/E selectivities of up to >99:1 and a broad spectrum of functional group tolerability.
Cobalt-catalyzed aerobic oxidation of (E)- and (Z)-bishomoallylic alcohols
作者:Bárbara Menéndez Pérez、Jens Hartung
DOI:10.1016/j.tetlet.2008.12.040
日期:2009.2
Stereoselectivity for (5-phenyltetrahydrofur-2-yl)alkan-1-ol formation (cis:trans < 1:99) from 5-methyl- and 5-phenyl-substituted 1-phenylpent-4-en-1-ols via cobalt-catalyzed aerobic oxidation was independent of the olefinic pi-bond configuration of the substrates. (C) 2008 Elsevier Ltd. All rights reserved.