کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1345103 | 980179 | 2008 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Histidine and deuterium labelled histidine by asymmetric catalytic reduction with gaseous H2 or D2; the role of strong non-coordinating acids
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی معدنی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An efficient and convenient route for the preparation of natural and unnatural histidine by asymmetric hydrogenation with rhodium–phosphine complexes is described. The reductions were performed in the presence of HBF4 to generate an essential imidazolyl cation. Stereoselective incorporation of D2 in the α,β-positions was obtained by catalytic deuteration in the presence of MeOD.
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(2R,3S)-Methyl 2-benzamido-3-(1H-imidazol-4-yl)(2,3-dideutero)propanoate[α]D25=+72.1 (c 0.5, HBF4 1.6 M in CH3OH)Absolute configuration: (2R,3S)
(2S,3R)-Methyl 2-benzamido-3-(1H-imidazol-4-yl)(2,3-dideutero)propanoate[α]D25=-70.7 (c 0.5, HBF4 1.6 M in CH3OH)Absolute configuration: (2S,3R)
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron: Asymmetry - Volume 19, Issue 3, 19 February 2008, Pages 273–278
Journal: Tetrahedron: Asymmetry - Volume 19, Issue 3, 19 February 2008, Pages 273–278
نویسندگان
E. Cesarotti, I. Rimoldi, D. Zerla, G. Aldini,