Asymmetric Hydrogenation of α,β-Unsaturated Nitriles with Base-Activated Iridium N,P Ligand Complexes
作者:Marc-André Müller、Andreas Pfaltz
DOI:10.1002/anie.201402053
日期:2014.8.11
Although many chiralcatalysts are known that allow highly enantioselective hydrogenation of a wide range of olefins, no suitable catalysts for the asymmetric hydrogenation of α,β‐unsaturated nitriles have been reported so far. We have found that Ir N,P ligand complexes, which under normal conditions do not show any reactivity towards α,β‐unsaturated nitriles, become highly active catalysts upon addition
Brønsted acid mediated nitrogenation of propargylic alcohols: an efficient approach to alkenyl nitriles
作者:Xiaoqiang Huang、Ning Jiao
DOI:10.1039/c4ob00888j
日期:——
A novel and efficient approach to alkenyl nitriles from readily available propargylic alcohols has been developed. This nitrogenation reaction is transition-metal-free and could be conducted under air at ambient temperature, which makes this protocol promising and practical. Moreover, NH4Br is disclosed as an efficient additive to promote the stereoselectivity of this reaction.
Highly Efficient Rh-Catalyzed Asymmetric Hydrogenation of α,β-Unsaturated Nitriles
作者:Qiaozhi Yan、Duanyang Kong、Meina Li、Guohua Hou、Guofu Zi
DOI:10.1021/jacs.5b06418
日期:2015.8.19
A highly efficient enantioselectivehydrogenation of α,β-unsaturated nitriles catalyzed by Rh-(R,R)-f-spiroPhos complex has been developed. With Rh-(R,R)-f-spiroPhos catalyst and under mild conditions, a wide range of α,β-unsaturated nitriles including the (E)- and (Z)-isomers of 3-alkyl-3-aryl, 3,3-diaryl, and 3,3-dialkyl α,β-unsaturated nitriles were hydrogenated to the corresponding chiral nitriles
[EN] NOVEL TRPV3 MODULATORS<br/>[FR] NOUVEAUX MODULATEURS DE TRPV3
申请人:ABBOTT LAB
公开号:WO2012019315A1
公开(公告)日:2012-02-16
Disclosed herein are modulators of TRPV3 of formula (I), wherein G1, X1, X2, X3, X4, X5, G2, Z1, Ra, Rb, u, and p are as defined in the specification. Compositions comprising such compounds and methods for treating conditions and disorders using such compounds and compositions are also presented.
β-unsaturated amides and alkenyl nitriles from readily available propargylic alcohols. The reaction proceeded smoothly under the neutral conditions with hydroxylaminehydrochloride (NH2OH·HCl) as the nitrogen source. The development of these new strategies has significantly extended the application of hydroxylaminehydrochloride to the chemistry of propargylic alcohols. Moreover, both secondary and tertiary alcohols