Thymidine phosphorylase was used to catalyze the conversion of thymidine (or methyluridine) and uracil incorporating stable isotopes to deoxyuridine (or uridine) with the uracil base incorporating the stable isotope. These base-exchange reactions proceeded with high conversion rates (75-96%), and the isolated yields were also good (64-87%). The masses of all synthetic compounds incorporating stable isotopes were identical to the theoretical molecular weights via EIMS. C-13 NMR spectra showed spin-spin coupling between C-13 and N-15 in the synthetic compounds, and the signals were split, further proving incorporation of the isotopes into the compounds. The RNA interference effects of this siRNA with uridine incorporating stable isotopes were also investigated. A 25mer siRNA had a strong knockdown effect on the MARCKS protein. The insertion position and number of uridine moieties incorporating stable isotopes introduced into the siRNA had no influence on the silencing of the target protein. This incorporation of stable isotopes into RNA and DNA has the potential to function as a chemically benign tracer in cells. (c) 2015 Elsevier Ltd. All rights reserved.
Synthesis of
<sup>13</sup>
C‐labelled compounds having a urea unit, and observation of
<sup>13</sup>
C‐isotope effect in their infrared spectra
Various drugs and nucleic acids containing a urea unit were synthesized from [C-13]urea. The C-13-isotope effect in the infrared spectra of these compounds was examined.
KAMINSKI, V. V.;SWENTON, J. S.;COTTRELL, C. E., TETRAHEDRON LETT., 1982, 23, N 41, 4207-4210
作者:KAMINSKI, V. V.、SWENTON, J. S.、COTTRELL, C. E.
DOI:——
日期:——
KAMINSKI, V. V.;COMBER, R. N.;WEXLER, A. J.;SWENTON, J. S., J. ORG. CHEM., 1983, 48, N 14, 2337-2346
作者:KAMINSKI, V. V.、COMBER, R. N.、WEXLER, A. J.、SWENTON, J. S.
DOI:——
日期:——
Synthesis and purification of [2-13C]-5-fluorouracil
作者:Huzaifa S. Rangwala、John W. Giraldes、Vadim J. Gurvich