aliphatic carboxylic acids with D2O as an inexpensive deuterium source. The use of Ph3P as an O‐atom transfer reagent can facilitate the deoxygenation of aromatic acids, while Ph2POEt is a better O‐atom transfer reagent for aliphatic acids. The highly precise deoxygenation of complex carboxylic acids makes this protocol promising for late‐stage deoxygenative deuteration of natural product derivatives
作者:Jaya Kishore Vandavasi、XiYe Hua、Hamdi Ben Halima、Stephen G. Newman
DOI:10.1002/anie.201710241
日期:2017.11.27
The use of transition‐metal catalysis to enable the coupling of readily available organic molecules has greatly enhanced the ability of chemists to access complex chemical structures. In this work, an intermolecular coupling reaction that unites organotriflates and aldehydes is presented. A unique catalyst system is identified to enable this reaction, featuring a Ni0 precatalyst, a tridentate Triphos
efficient synthesis of aldehydes from acidchlorides with hydrosilanes as a reducing agent in the presence of a palladium catalyst has been achieved. A simple mixture of commercially available Pd(dba)2 and Mes3P as a catalyst realized the reduction of various acidchlorides including aliphatic acidchlorides and α,β-unsaturated acidchlorides to the corresponding aldehydes in good to high yields under
A new synthesis of aldehydes by the palladium-catalyzed reaction of 2-pyridinyl esters with hydrosilanes is described. The reaction is applicable to the preparation of aliphatic, aromatic, and α,β-unsaturated aldehydes. Various functional groups, such as fluoro, methoxy, aldehyde, acetal, and ester, are tolerated.
established using sodium hydride (NaH) in the presence of sodium iodide (NaI) under mild reaction conditions. The present protocol with the NaH‐NaI composite allows for reduction of not only aromatic and heteroaromatic but also aliphatic N,N‐dimethylamides with wide substituent compatibility. Retention of α‐chirality in the reduction of α‐enantioriched amides was accomplished. Use of sodium deuteride (NaD)