Iridium-Catalyzed Highly Efficient and Site-Selective Deoxygenation of Alcohols
作者:Shiyi Yang、Weiping Tang、Zhanhui Yang、Jiaxi Xu
DOI:10.1021/acscatal.8b02495
日期:2018.10.5
An iridium-catalyzed, highly efficient, and site-selective deoxygenation of primary, secondary, and tertiary alcohols has been realized, under the assistance of a 4-(N-substituted amino)aryl directing group. Only the hydroxyl adjacent to the directing group can be deoxygenated. The deoxygenation is performed in water, with formic acid as both the promoter and hydride donor. Excellent yields and functionality
A Direct Brønsted Acid-Catalyzed Azidation of Benzhydrols and Carbohydrates
作者:Jeffery Regier、Robert Maillet、Yuri Bolshan
DOI:10.1002/ejoc.201900104
日期:2019.4.9
HBF4·OEt2 complex was used as an efficient Brønsted acid catalyst for direct azidation reactions on substrates bearing benzhydryl and anomeric alcohols. This methodology demonstrated excellent functional group tolerance to both electron‐rich and electron‐poor benzhydrylalcohols as well as unprotected functional groups.
Reaction of aryl- or heteroarylboronicacids with aldehydes, in the presence of PdCl2 and P(1-Nap)3, afforded carbinol derivatives in good to excellent yields. The efficiency of this reaction was demonstrated by the compatibility with nitro, cyano, acetamido, acetoxy, acetyl, carboxyl, trifluoromethyl, fluoro, and chloro groups and the possibility of involving aliphatic aldehyde or hindered substrates
The combined use of a halogenbond (XB) donor with trimethylsilyl halide was found to be an efficient cocatalytic system for the direct dehydroxylative coupling reaction of alcohol with various nucleophiles, such as allyltrimethylsilane and trimethylcyanide, to give the corresponding adduct in moderate to excellent yields. Detailed control experiments and mechanistic studies revealed that the XB interaction
Synthesis, Biological Evaluation, and Binding Mode of Novel 1-[2-(Diarylmethoxy)ethyl]-2-methyl-5-nitroimidazoles Targeted at the HIV-1 Reverse Transcriptase
作者:Romano Silvestri、Marino Artico、Gabriella De Martino、Rino Ragno、Silvio Massa、Roberta Loddo、Chiara Murgioni、Anna Giulia Loi、Paolo La Colla、Alessandra Pani
DOI:10.1021/jm010904a
日期:2002.4.1
A novel series of 1-[2-(diarylmethoxy)ethyl]-2-methyl-5-nitroimidazole (DAMNI) analogues were synthesized and tested in cell-based assays and in enzyme assays against HIV-1 recombinant reverse transcriptase (RT). Preparation of the new derivatives was performed by reacting the appropriate benzhydrols or the corresponding bromides with 1-(2-hydroxyethyl)-2-methyl-5-nitroimidazole or the 3-hydroxypropyl