Synthesis of (Z)-fluoroallyl azides through aluminium-mediated defluorinative functionalization reactions
摘要:
The reaction of difluorohomoallyl alcohols with Me2AlCl in CH2Cl2 selectively gave (Z)-fluoroallyl chlorides via S(N)2' type defluorinative chlorination. These chlorides were easily converted to the corresponding (Z)-fluoroallyl azides by the sequential nucleophilic azidation reaction using NaN3. Direct defluorinative azidation of the difluorohomoallyl alcohols was also achieved by treating with Me3SiN3 in the presence of Al(Oi-Pr)(3). Fluoroallyl azides thus obtained successfully applied to the Huisgen. 1,3-dipolar cycloaddition chemistry. (C) 2014 Elsevier Ltd. All rights reserved.
Copper-free defluorinative alkylation of allylic difluorides through Lewis acid-mediated C–F bond activation
摘要:
The reactions of difluorohomoallyl alcohols with trialkylaluminiums smoothly proceeded in CH2Cl2 at room temperature to give (Z)-fluoro-olefin products in excellent yields. On the basis of this chemistry, fluoro-olefinic dipeptide isostere of norvalinyl glycine was synthesized in stereoselective manner. (C) 2011 Elsevier Ltd. All rights reserved.
The reactions of difluorohomoallyl alcohols with trialkylaluminiums smoothly proceeded in CH2Cl2 at room temperature to give (Z)-fluoro-olefin products in excellent yields. On the basis of this chemistry, fluoro-olefinic dipeptide isostere of norvalinyl glycine was synthesized in stereoselective manner. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of (Z)-fluoroallyl azides through aluminium-mediated defluorinative functionalization reactions
The reaction of difluorohomoallyl alcohols with Me2AlCl in CH2Cl2 selectively gave (Z)-fluoroallyl chlorides via S(N)2' type defluorinative chlorination. These chlorides were easily converted to the corresponding (Z)-fluoroallyl azides by the sequential nucleophilic azidation reaction using NaN3. Direct defluorinative azidation of the difluorohomoallyl alcohols was also achieved by treating with Me3SiN3 in the presence of Al(Oi-Pr)(3). Fluoroallyl azides thus obtained successfully applied to the Huisgen. 1,3-dipolar cycloaddition chemistry. (C) 2014 Elsevier Ltd. All rights reserved.