Z-Selective Horner–Wadsworth–Emmons reaction of 2-TOM-cyclopentanone for the synthesis of rac-N-Cbz-Gly-Ψ[(Z)-CF C]-Pro-OH dipeptide isostere
摘要:
The Horner-Wadsworth-Emmons reactions of 2-fluoro-2-diethylphosphonoacetic acid with 241(triisopropylsilyl)oxy]methyl)cyclopentanone (2-TOM-cyclopentanone) using methylrnagnesium chloride furnished the corresponding tetra-substituted fluoroolefin in a Z-selective manner (E/Z = 9:91). A facile synthesis of rac-N-Cbz-Gly-Psi[(Z)-CF=C]-Pro-OH as a dipeptide isostere was achieved based on the Z-selective Horner-Wadsworth-Emmons reaction. (C) 2014 Elsevier Ltd. All rights reserved.
The Horner-Wadsworth-Emmons reactions of 2-fluoro-2-diethylphosphonoacetic acid with 241(triisopropylsilyl)oxy]methyl)cyclopentanone (2-TOM-cyclopentanone) using methylrnagnesium chloride furnished the corresponding tetra-substituted fluoroolefin in a Z-selective manner (E/Z = 9:91). A facile synthesis of rac-N-Cbz-Gly-Psi[(Z)-CF=C]-Pro-OH as a dipeptide isostere was achieved based on the Z-selective Horner-Wadsworth-Emmons reaction. (C) 2014 Elsevier Ltd. All rights reserved.
E-Selective Horner–Wadsworth–Emmons reaction of 2-OBO-cyclopentanone for the synthesis of rac-N-Cbz-Gly-Ψ[(E)-CFC]-Pro-OH dipeptide isostere
作者:Shigeki Sano、Tomoya Matsumoto、Michiyasu Nakao
DOI:10.1016/j.tetlet.2014.06.063
日期:2014.8
The Horner-Wadsworth-Emmons reactions of ethyl 2-fluoro-2-diethylphosphonoacetate with 2-(4-methyl-2,6,7-trioxabicyclo[2.2.2]octan-1-yl)cyclopentanone (2-OBO-cyclopentanone) using n-butyl-lithium furnished the corresponding tetra-substituted fluoroolefin in an E-selective manner (E:Z = 95:5). A facile synthesis of rac-N-Cbz-Gly-Psi[(E)-CF=C]-Pro-OH as a dipeptide isostere was achieved based on the E-selective Horner-Wadsworth-Emmons reaction. (C) 2014 Elsevier Ltd. All rights reserved.