Copper(I)-Catalyzed Allylic Substitutions with a Hydride Nucleophile
作者:T. N. Thanh Nguyen、Niklas O. Thiel、Felix Pape、Johannes F. Teichert
DOI:10.1021/acs.orglett.6b00941
日期:2016.5.20
easily accessible copper(I)/N-heterocyclic carbene (NHC) complex enables a regioselective hydride transfer to allylic bromides, an allylic reduction. The resulting aryl- and alkyl-substituted branched α-olefins, which are valuable building blocks for synthesis, are obtained in good yields and regioselectivity. A commercially available silane, (TMSO)2Si(Me)H, is employed as hydride source. This protocol
Ni-Catalyzed Arylboration of Unactivated Alkenes: Scope and Mechanistic Studies
作者:Stephen R. Sardini、Alison L. Lambright、Grace L. Trammel、Humair M. Omer、Peng Liu、M. Kevin Brown
DOI:10.1021/jacs.9b03991
日期:2019.6.12
unactivated monosubstituted, 1,1-disubstituted, and trisubstituted alkenes is disclosed. The reaction is notable in that it converts highly substituted alkenes, aryl bromides, and diboron reagents to products that contain a quaternary carbon and a synthetically versatile carbon-boron bond with control of stereoselectivity and regioselectivity. In addition, the method is demonstrated to be useful for the
Asymmetric Synthesis of Dihydropyranones via Gold(I)‐Catalyzed Intermolecular [4+2] Annulation of Propiolates and Alkenes
作者:Hanbyul Kim、Su Yeon Choi、Seunghoon Shin
DOI:10.1002/anie.201807514
日期:2018.10
Intermolecular asymmetric gold catalysis involving alkyne activation presents a significant challenge due to its distinct mechanistic mode from other metals. Herein, we report a highly enantioselective synthesis of α,β‐unsaturated δ‐lactones from [4+2] annulation of propiolates and alkenes in upto 95 % ee. Notably, for the desired chiral recognition, the choice of 1,1,2,2‐tetrachloroethane as solvent
A New Type of Stereoselectivity in Baeyer-Villiger Reactions: Access to<i>E</i>- and<i>Z</i>-Olefins
作者:Zhi-Gang Zhang、Gheorghe-Doru Roiban、Juan Pablo Acevedo、Iakov Polyak、Manfred T. Reetz
DOI:10.1002/adsc.201200759
日期:2013.1.14
monooxygenases are employed as catalysts in diastereoselective Baeyer–Villiger reactions leading to the corresponding E‐ or Z‐configurated lactones. Wild‐type cyclohexanone monooxygenase (CHMO) as catalyst delivers the E‐isomers and a directed evolution mutant the opposite Z‐isomers. Subsequent transition metal‐catalyzed chemical transformations of a key product containing a vinyl bromide moiety provide a variety
INHIBITORS OF C-JUN N-TERMINAL KINASES FOR THE TREATMENT OF NEURODEGENERATIVE DISORDERS RELATING TO APOPTOSIS AND/OR INFLAMMATION
申请人:KHAN Afzal
公开号:US20100035878A1
公开(公告)日:2010-02-11
The present invention provides novel compounds of formula I and their use in the inhibition of c-Jun N-terminal kinases. The present invention further provides the use of these compounds in medicine, in particular in the prevention and/or treatment of neurodegenerative disorders related to apoptosis and/or inflammation.