865692-66-6Relevant articles and documents
Photoinduced Regioselective Olefination of Arenes at Proximal and Distal Sites
Ali, Wajid,Anjana, S. S.,Bhattacharya, Trisha,Chandrashekar, Hediyala B.,Goswami, Nupur,Guin, Srimanta,Maiti, Debabrata,Panda, Sanjib,Prakash, Gaurav,Saha, Argha,Sasmal, Sheuli,Sinha, Soumya Kumar
supporting information, p. 1929 - 1940 (2022/02/01)
The Fujiwara-Moritani reaction has had a profound contribution in the emergence of contemporary C-H activation protocols. Despite the applicability of the traditional approach in different fields, the associated reactivity and regioselectivity issues had
DERIVATIVES OF PIPERLONGUMINE AND USES THEREOF
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Page/Page column 91; 92, (2019/06/11)
The present invention relates to a group of 1-[(E)-3-(3,4,5-trimethoxyphenyl)prop-2-enoyl]-2,3- dihydropyridin-6-one (piperlongumine) derivatives, analogs and pharmaceutically acceptable salts thereof. The present invention also relates to processes for preparing the same; a pharmaceutical composition and formulation containing a derivative of piperlogumine; and use of the derivatives and analogs for treating cancer.
Regioselectivity of Michael additions to 3-(pyridin-3-yl or pyrimidin-2-yl)-propenoates and their N-oxides - Experimental and theoretical studies
Lewandowska, Elzbieta,Chatfield, David C.
, p. 3297 - 3303 (2007/10/03)
We demonstrate that nucleophilic addition to α,β-unsaturated carbonyl compounds can be redirected from the usual β-carbon (Michael) to an α-carbon regioselectivity by attaching a π-deficient aromatic substituent to the β-carbon atom. In particular, propanethiol addition to 3-(pyridin-3-yl or pyrimidin-2-yl)propenoate gives a β-carbon adduct, while addition to the corresponding more π-deficient N-oxides gives the α-adduct or a mixture of α- and β-adducts. This adds to the number of carbon-carbon bond-forming reactions at the α-position of Michael receptors documented recently. Density functional calculations reveal that the regioselectivity is due to a combination of reduction of the barrier for α-addition and increase of the barriers for β-addition and carbonyl addition as the π-deficient character of the aromatic substituent is increased. The calculations predict a significant solvent effect on the regioselectivity in some cases. The regioselectivity is also consistent with Hammett constants σ-. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.