The described system offers an ideal, user-friendly protocol for the chemoselective homogeneous hydrogenation of α,β-unsaturatedketones at room temperature using methanol as a liquid organic hydrogen carrier. Excellent yields were achieved with an in situ-prepared phosphine-free Cp*Ir(III)/bipyridonate complex. Chemoselective reduction with other reducible functionalities and late-stage functionalization
所描述的系统为使用甲醇作为液态有机氢载体在室温下对α、β-不饱和酮进行化学选择性均相氢化提供了一种理想的、用户友好的协议。使用原位制备的无膦Cp*Ir( III )/联吡啶络合物获得了优异的产率。还探索了具有其他可还原功能和后期功能化的化学选择性还原。
Heterobimetallic Pd–Sn Catalysis: Michael Addition Reaction with C-, N-, O-, and S-Nucleophiles and in Situ Diagnostics
作者:Debjit Das、Sanjay Pratihar、Sujit Roy
DOI:10.1021/jo302643v
日期:2013.3.15
An efficient Michael addition reaction of differently substituted enones with carbon, sulfur, oxygen, and nitrogen nucleophiles has been achieved by a new heterobimetallic "Pd-Sn" catalyst system. The nature of the catalytically relevant species and their interactions with the enone moiety has been examined by spectroscopy. The effect of ligand and the coordination mode of enone with "Pd-Sn" heterobimetallic system have been investigated by kinetics and DFT studies. A straightforward application of this methodology is shown in the synthesis of 1,4-oxathiepane core.