108478-16-6Relevant articles and documents
Three-Component Ni-Catalyzed Silylacylation of Alkenes
Ni, Dongshun,Brown, M. Kevin
, p. 1858 - 1862 (2021)
A Ni-catalyzed silylacylation of alkenes is presented. The reaction combines alkenes, ClZnSiR3, and acid chlorides to provide rapid access to β-silyl ketones. Importantly, the method involves a [Ni]-SiR3 complex as a catalytic intermediate, which is rarely described for three-component alkene functionalization. Finally, the synthetic utility of the products is demonstrated, and the mechanistic details are described.
Organoiodine-induced hydroxylation as well as enantioselective alkoxylation/hydroxylation of allylic alcohols via 1,2- aryl migration
Deng, Qingfu,Gao, Tianyong,Hu, Liangzhen,Xiong, Yan
supporting information, (2021/08/03)
A new method for the hydroxylation of allylic alcohols using [hydroxyl(tosyloxy)iodo]benzene (HTIB) as both oxidant and reagent has been developed. Meanwhile, the enantioselective alkyoxylation as well as hydroxylation catalyzed by simple chiral iodine be
Visible-light-induced oxidative lignin c-c bond cleavage to aldehydes using vanadium catalysts
Liu, Huifang,Li, Hongji,Luo, Nengchao,Wang, Feng
, p. 632 - 643 (2020/01/02)
Lignin is the largest carrier of aromatics on earth, and its depolymerization can afford value-Added aromatic products. Direct cleavage of the C-C bonds in lignin linkages is significant, but it is challenging to obtain low-molecular-weight aromatic monomers. Herein, using vanadium catalysts under visible light, we selectively cleave the C-C bonds in β-1 and β-O-4 interlinkages occluded in lignin models and extracts by an oxidative protocol. Visible light irradiation triggered single electron transfer between the substrate and the catalyst, which further induced the selective Cα-Cβ bond cleavage and generated the final aromatic products through radical intermediates. Using this photocatalytic chemistry, the reactivity of lignin models and the selectivity of Cα-Cβ bond cleavage were significantly improved. More importantly, this protocol affords aromatic monomers through the fragmentation of organosolv lignins even at room temperature, indicating the potential of photocatalytic C-C bond cleavage of lignin linkages under ambient conditions.