Mild Synthesis of Sterically Congested Alkyl Aryl Ethers
作者:Erik Lindstedt、Elin Stridfeldt、Berit Olofsson
DOI:10.1021/acs.orglett.6b01975
日期:2016.9.2
arylation of tertiary alcohols with ortho-substituted diaryliodonium salts. The scope covers cyclic and acyclic aliphatic, benzylic, allylic, and propargylic tertiary alcohols as well as primary and secondary fluorinated alcohols. The methodology gives access to alkyl aryl ethers of previously unprecedented steric congestion. Furthermore, the versatility of the developed procedure was demonstrated by arylation
CX (X=Br, I) Bond-Tolerant Aerobic Oxidative Cross- Coupling: A Strategy to Selectively Construct β-Aryl Ketones and Aldehydes
作者:Mao Chen、Jie Wang、Ziyi Chai、Cai You、Aiwen Lei
DOI:10.1002/adsc.201100782
日期:2012.2
aryl halide-containing β-aryl ketones and aldehydes can be synthesized directly from readily available allyic alcohols and boronic acids via palladium-catalyzedoxidativecross-coupling reactions. The dual roles of copper, including electron-carrier and Lewis acid functions, are supposed to be critical for the high reactivity and selectivity of this aerobic oxidative coupling transformation.
Diminutive effect on T and B-cell proliferation of non-cytotoxic α-santonin derived 1,2,3-triazoles: A report
作者:Praveen K. Chinthakindi、Payare L. Sangwan、Saleem Farooq、Rajeshwar R. Aleti、Anupurna Kaul、Ajit K. Saxena、Y.L.N. Murthy、Ram A. Vishwakarma、Surrinder Koul
DOI:10.1016/j.ejmech.2012.12.018
日期:2013.2
alpha-Santonin derived new series of 1,2,3-triazoles synthesized through Azide Alkyne Huisgen 1,3-dipolar cycloaddition reaction between substituted aryl azide and a propargylated alpha-desmotrosantonin were bio-evaluated for their diminutive effect on ConA induced T-cell and LPS induced B-cell proliferation. Interestingly, most of the synthesized compounds showed better immunosuppressant activity than alpha-santonin. Triazole derivatives 9, 10, 17, 18, 29, and 30 displayed significant diminutive effect on cell proliferation. Compounds 12 and 13 were found selective against ConA T-cell proliferation exhibiting >90% inhibition at 1 x 10(-6) M concentration. The present study resulted in identification of several triazole derivatives as effective immunosuppressive agents. (C) 2012 Elsevier Masson SAS. All rights reserved.
Synthesis of Phenols and Aryl Silyl Ethers via Arylation of Complementary Hydroxide Surrogates
Two transition-metal-free methods to access substituted phenols via the arylation of silanols or hydrogen peroxide with diaryliodoniumsalts are presented. The complementary reactivity of the two nucleophiles allows synthesis of a broad range of phenols without competing aryne formation, as illustrated by the synthesis of the anesthetic Propofol. Furthermore, silyl-protected phenols can easily be obtained