Design of substituted tetrahydrofuran derivatives for HIV-1 protease inhibitors: synthesis, biological evaluation, and X-ray structural studies
作者:Arun K. Ghosh、Daniel Lee、Ashish Sharma、Megan E. Johnson、Ajay K. Ghosh、Yuan-Fang Wang、Johnson Agniswamy、Masayuki Amano、Shin-ichiro Hattori、Irene T. Weber、Hiroaki Mitsuya
DOI:10.1039/d4ob00506f
日期:——
Substituted tetrahydrofuran derivatives were designed and synthesized to serve as the P2 ligand for a series of potent HIV-1 proteaseinhibitors. Both enantiomers of the tetrahydrofuran derivatives were synthesized stereoselectivity in optically active forms using lipase-PS catalyzed enzymatic resolution as the key step. These tetrahydrofuran derivatives are designed to promote hydrogen bonding and van der
A new route to alpha-hydroxy-gamma-butyrolactones through three-component radical coupling of 1,3-dioxoranes, acrylates, and molecular oxygen using N-hydroxyphthalimide (NHPI) as a key catalyst has been developed. For example, the addition of 1,3dioxarane to methyl acrylate under dioxygen by NHPI followed by catalytic hydrogenation of the resulting adduct on Pd/C afforded alpha-hydroxy-gamma-butyrolactone in good yield. This method provides a facile approach to alpha-hydroxy-gamma-butyrolactones, which are difficult to synthesize by conventional methods. (c) 2005 Elsevier Ltd. All rights reserved.
Efficient Radical Oxygenation of α-Iodocarboxylic Acid Derivatives
作者:Nobuhiro Kihara、Cyril Ollivier、Philippe Renaud
DOI:10.1021/ol990971n
日期:1999.11.1
[GRAPHICS]Treatment of alpha-iodocarboxylic acid derivatives with 2 equiv of triethylborane under oxygen atmosphere gives the corresponding a-hydroxy acid derivatives. This method is based on an iodine atom transfer from the ethyl radical, generated by the reaction of triethylborane and oxygen, with the alpha-iodocarbonyl compound. It offers several advantages over classical ionic substitution reactions: no elimination product is observed, tertiary iodides are efficiently converted to alcohols, and finally, this one-step procedure is working with substrates sensitive to nucleophiles.
v. Wacek; Wagner, Osterreichische Chemiker-Zeitung, 1937, vol. 40, p. 387,390, 401, 408