Rhodium-catalyzed regioselective hydroaminomethylation of terminal olefins with pyrrole-based tetraphosphorus ligands
作者:Guodu Liu、Zhao Li、Huiling Geng、Xumu Zhang
DOI:10.1039/c3cy01069d
日期:——
developed to prepare linearamines by regioselectivehydroaminomethylation of terminalolefins with pyrrole-based tetraphosphorus ligands. It has been documented that the reactivity of the ligand is modulated by the substituent of the biphenylphosphane moiety. Ligand L5 containing electron-donating groups exhibited the highest reactivity, with up to 70.9 n/i ratio and 99.5% amine selectivity for 1-pentene
通过使用基于吡咯的四磷配体的末端烯烃的区域选择性氢氨基甲基化,开发了一种简洁优雅的方法来制备线性胺。已经证明,配体的反应性是由联苯膦部分的取代基调节的。含给电子基团的配体L5表现出最高的反应性,对1-戊烯的比率高达70.9 n / i,胺选择性为99.5%,对1-己烯的比率为31.3 n / i,胺选择性为97.9%。
Ba-Catalyzed Direct Mannich-Type Reactions of a β,γ-Unsaturated Ester Providing β-Methyl <i>aza</i>-Morita−Baylis−Hillman-Type Products
Barium-catalyzed direct Mannich-type reactions of a beta,gamma-unsaturated ester are described. The Ba-catalyst not only promoted the Mannich-type reactions, but also isomerizedMannich adducts to afford beta-methyl aza-Morita-Baylis-Hillman-type products in 61-88% yield from various aryl, heteroaryl, and alkyl imines. Preliminary trials on enantioselective variants with a chiral biaryldiol ligand