Aldehyde-Selective Wacker-Type Oxidation of Unbiased Alkenes Enabled by a Nitrite Co-Catalyst
作者:Zachary K. Wickens、Bill Morandi、Robert H. Grubbs
DOI:10.1002/anie.201306756
日期:2013.10.18
rules: Reversal of the high Markovnikov selectivity of Wacker‐type oxidations was accomplished using a nitrite co‐catalyst. Unbiased aliphatic alkenes can be oxidized with high yield and aldehyde selectivity, and several functional groups are tolerated. 18O‐labeling experiments indicate that the aldehydic O atom is derived from the nitrite salt.
Palladium-catalyzed site-selective arylation of aliphatic ketones enabled by a transient ligand
作者:Lei Pan、Ke Yang、Guigen Li、Haibo Ge
DOI:10.1039/c8cc00980e
日期:——
Transition metal-catalyzed direct C–H bond functionalization enabled by transient ligands has become an attractive topic. Here we report a palladium-catalyzed site-selective arylation of β-C(sp3)–H bonds in aliphatic ketones with β-alanine as the transient ligand.
Tuning isoform selectivity and bortezomib sensitivity with a new class of alkenyl indene PDI inhibitor
作者:Reeder M. Robinson、Leticia Reyes、Ravyn M. Duncan、Haiyan Bian、Eric D. Strobel、Sarah L. Hyman、Allen B. Reitz、Nathan G. Dolloff
DOI:10.1016/j.ejmech.2019.111906
日期:2020.1
indene pharmacophore and show a high degree of correlationbetween potency of PDI inhibition and bortezomib (Btz) potentiation in MM cells. Inhibition of PDI leads to ER and oxidative stress characterized by the accumulation of misfolded poly-ubiquitinated proteins and the induction of UPR biomarkers ATF4, CHOP, and Nrf2. This work characterizes the synthesis and SAR of a new chemical class and further
Diphenylammonium triflate (DPAT): efficient catalyst for esterification of carboxylic acids and for transesterification of carboxylic esters with nearly equimolar amounts of alcohols
Diphenylammonium triflate (DPAT) efficiently catalyzed esterification betweenequimolaramounts of carboxylicacids and alcohols in good to excellent yields under mild reaction conditions. Transesterification of carboxylicesters with a slight excess of alcohols also proceeded using DPAT as catalyst with TMSCl as a co-catalyst.
A KI-mediated radical anti-Markovnikov addition of simple ketones/esters to unactivated alkenes
作者:Yunfei Tian、Changqing Sun、Ren Xiang Tan、Zhong-Quan Liu
DOI:10.1039/c7gc03745g
日期:——
A KI-mediated radical anti-Markovnikov addition of simple ketones and esters to unactivated alkenes was developed. Through this strategy, a wide range of complex carbonyl compounds can be conveniently synthesized in high selectivities. In addition, this method features high atom-economy and is transition-metal free, operationally simple and environmentally benign.