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We prepared triazidomethane from iodoform and a concentrated solution of tributylhexadecylphosphonium azide in chloroform
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We prepared triazidomethane from iodoform and a concentrated solution of tributylhexadecylphosphonium azide in chloroform.
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26
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34250710337
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3 in chloroform.
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3 in chloroform.
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34250699223
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Crystallographic data for 4a: C25H36N 12, M, 504.66, monoclinic, space group P2 1/c, Z, 4, a, 11.1484(6, b, 11.0673(5, c, 21.2600(13) Å, β, 90.153(5)°, V, 2623.1(2) Å3, ρcalcd, 1.278 g cm-3, T, 298 K, crystal size 0.40 x 0.35 x 0.20 mm3, R, 0.0605 (I>2σ(I, Rw, 0.2078, GOF, 1.023. Crystallographic data for 4b: C33H48N12, M, 612.83, triclinic, space group P1, Z, 4, a, 12.250(4, b, 12.373(4, c, 22.192(5) Å, α, 81.041(9, β, 82.336(9, γ, 85.500(11)°, V, 3287.1(18) Å3, ρcalcd, 1.238 g cm-3, T, 298 K, crystal size 0.30 x 0.30 x 0.30 mm3, R, 0.0762 I > 2σ
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3, R = 0.0762 (I > 2σ(I), Rw = 0.2545, GOF = 1.048. CCDC-619288 and -619287 (4a and 4b, respectively) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/ data_request/cif.
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34250711050
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Because the yield of 1 could not be determined by weighing (see the Safety Precautions, the integration of the 13C NMR signal (without decoupling, delay of 60 s between the pulses) relative to those of weighed amounts of CCl4, CBr4, and tetrachloroethene was used. This resulted in a yield of 1-2% for the synthesis of 1 from 2h including isolation by gas chromatography and a yield of 60-87% for the generation of 1 from 3a and NaN3 or LiN3 without workup. As the method described above for determination of the yield is very laborious and inaccurate, the yields of the stable succeeding products of 1 (Schemes 1 and 2) were based on precursor 2h. Thus, we obtained 6 in 3% yield (based on 2h) as well as 8 in 2, 9a in 2, 9b in 0.1, 10a in 0.7, and 10b in 0.1% yield
-
3 without workup. As the method described above for determination of the yield is very laborious and inaccurate, the yields of the stable succeeding products of 1 (Schemes 1 and 2) were based on precursor 2h. Thus, we obtained 6 in 3% yield (based on 2h) as well as 8 in 2%, 9a in 2%, 9b in 0.1%, 10a in 0.7%, and 10b in 0.1% yield.
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and references therein
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M. A. Petrie, J. A. Sheehy, J. A. Boatz, G. Rasul, G. K. S. Prakash, G. A. Olah, K. O. Christe, J. Am. Chem. Soc. 1997, 119, 8802-8808, and references therein.
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34250782941
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[18] was not successful. However, variants of this click reaction in water-free solvents have also hitherto failed.
-
[18] was not successful. However, variants of this click reaction in water-free solvents have also hitherto failed.
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44
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34250708209
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3 and concentrated aqueous hydrochloric acid (59% yield over the two steps).
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3 and concentrated aqueous hydrochloric acid (59% yield over the two steps).
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45
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37049097001
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D. M. Kanjia, J. Mason, I. A. Stenhouse, R. E. Banks, N. D. Venayak, J. Chem. Soc. Perkin Trans. 2 1981, 975-979.
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46
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34250751540
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The spectroscopic data for 4a,b, 6, 8, 9a,b, and 10a,b as well as (further) suggestions of reaction mechanisms to explain the formation of 6, 9a,b, and 10a,b are collected in the Supporting Information.
-
The spectroscopic data for 4a,b, 6, 8, 9a,b, and 10a,b as well as (further) suggestions of reaction mechanisms to explain the formation of 6, 9a,b, and 10a,b are collected in the Supporting Information.
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