Approximate rate constants for intermolecular additions of alkyl radicals to phenylsulfonyl oxime ethers
作者:Sunggak Kim、Ill Young Lee
DOI:10.1016/s0040-4039(98)00035-5
日期:1998.3
Approximate rateconstants for intermolecular additions of alkylradicals to phenylsulfonyl oxime ethers (2a and 2b) have been determined to be ka=9.6×105 M−1s−1 at 25 °C for 2a and ka=7.3×104 M−1s−1 at 60 °C for 2b, indicating that the additions are fast and highly efficient processes. The kinetic data have been confirmed by two competition experiments.
已确定在25°C下2a和k a = 7.3×10 4的分子间烷基向苯磺酰基肟醚(2a和2b)分子间加成的近似速率常数为k a = 9.6×10 5 M -1 s -1。M -1 s -1在60°C下持续2b,表明添加是快速且高效的过程。动力学数据已通过两次竞争实验得到证实。
[EN] ARGINASE INHIBITORS AND METHODS OF USE<br/>[FR] INHIBITEURS D'ARGINASE ET PROCÉDÉS D'UTILISATION
申请人:MERCK SHARP & DOHME
公开号:WO2019177873A1
公开(公告)日:2019-09-19
Described herein are compounds of Formula I or a pharmaceutically acceptable salt thereof. The compounds of Formula I act as arginase inhibitors and can be useful in preventing, treating or acting as a remedial agent for arginase-related diseases.
The three‐component free‐radical carbo‐alkenylation of electron‐richolefins has been studied, varying the substitution pattern in the alkene, in the radical precursor and in the final acceptor. New vinylsulfones were also prepared and their reactivity investigated. The scope and limitations of the process was established, and the reaction mechanism clarified using selected dienes as radical clocks
Cobalt Catalyzed Functionalization of Unactivated Alkenes: Regioselective Reductive C−C Bond Forming Reactions
作者:Boris Gaspar、Erick M. Carreira
DOI:10.1021/ja904856k
日期:2009.9.23
The cobalt catalyzed hydroaldoximation and hydrocyanooximation of unactivatedalkenes is reported. Secondary and tertiary aldoximes and oximonitriles are synthesized with excellent regioselectivity under mild conditions, and conversion of the products to valuable intermediates is documented. The reactions expand the arsenal of reductive carbon-carbon bond forming reactions as well as regioselective
Cobalt bis(acetylacetonate)–<i>tert</i>-butyl hydroperoxide–triethylsilane: a general reagent combination for the Markovnikov-selective hydrofunctionalization of alkenes by hydrogen atom transfer
作者:Xiaoshen Ma、Seth B Herzon
DOI:10.3762/bjoc.14.201
日期:——
and practical reagent combination to initiate a broad range of Markovnikov-selective alkene hydrofunctionalization reactions. These transformations are believed to proceed by cobalt-mediated hydrogen atom transfer (HAT) to the alkene substrate, followed by interception of the resulting alkyl radical intermediate with a SOMOphile. In addition, we report the first reductivecouplings of unactivated