Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (2): 292.doi: 10.7503/cjcu20130465
• Organic Chemistry • Previous Articles Next Articles
ZHANG Yongpo, ZHANG Yang, SUN Huailin*()
Received:
2013-05-16
Online:
2014-02-10
Published:
2014-01-03
Contact:
SUN Huailin
E-mail:sunhl@nankai.edu.cn
Supported by:
CLC Number:
TrendMD:
ZHANG Yongpo, ZHANG Yang, SUN Huailin. Stereo Selective Synthesis and Absolute Configuration Determination of (2E,4S)-4-(t-butoxycarbonylamino)-5-[(3S)-2'-oxo-3'-pyrrolidinyl]-2-pentenoic Acid Ethyl Ester†[J]. Chem. J. Chinese Universities, 2014, 35(2): 292.
Fig.2 Comparison of chiral HPLC analyses results of compound 4 and the racemic samplea. Racemic sample; b. compound 4 obtained in refluxing THF; c. optically pure compound 4 obtained at room temperature.
Empirical formula | C12H22N2O4 | F(000) | 560 |
---|---|---|---|
Formula weight | 258.32 | θ range | 5.82°—72.56° |
Temperature/K | 113(2) | Limiting indices | -9≤h≤9, -10≤k≤9, -26≤l≤25 |
Wavelength/nm | 0.154187 | Reflections collected/unique | 16207/2747[R(int)=0.0432] |
Crystal system | Orthorhombic | Completeness to θ=72.56(%) | 98.9 |
Space group | P212121 | Absorption correction | Semi-empirical from equivalents |
a/nm | 0.80190(10) | Max. and min. transmission | 0.8768 and 0.8523 |
b/nm | 0.81220(10) | Refinement method | Full-matrix least-squares on F2 |
c/nm | 2.1735(3) | Data/restraints/parameters | 2747/0/179 |
α/(°) | 90 | Goodness-of-fit on F2 | 1.089 |
β/(°) | 90 | Final R indices[I>2σ(I)] | R1=0.0293, wR2=0.0769 |
γ/(°) | 90 | R indices(all data) | R1=0.0303, wR2=0.0779 |
Volume/nm3, Z | 1.4156(3), 4 | Absolute structure parameter | 0.19(15) |
Calculated density/(g·cm-3) | 1.212 | Extinction coefficient | 0.0057(8) |
Absorption coefficient/mm-1 | 0.750 | Largest diff. peak and hole/(e·nm-3) | 154 and -192 |
Table 1 X-Ray diffraction data of compound 5
Empirical formula | C12H22N2O4 | F(000) | 560 |
---|---|---|---|
Formula weight | 258.32 | θ range | 5.82°—72.56° |
Temperature/K | 113(2) | Limiting indices | -9≤h≤9, -10≤k≤9, -26≤l≤25 |
Wavelength/nm | 0.154187 | Reflections collected/unique | 16207/2747[R(int)=0.0432] |
Crystal system | Orthorhombic | Completeness to θ=72.56(%) | 98.9 |
Space group | P212121 | Absorption correction | Semi-empirical from equivalents |
a/nm | 0.80190(10) | Max. and min. transmission | 0.8768 and 0.8523 |
b/nm | 0.81220(10) | Refinement method | Full-matrix least-squares on F2 |
c/nm | 2.1735(3) | Data/restraints/parameters | 2747/0/179 |
α/(°) | 90 | Goodness-of-fit on F2 | 1.089 |
β/(°) | 90 | Final R indices[I>2σ(I)] | R1=0.0293, wR2=0.0769 |
γ/(°) | 90 | R indices(all data) | R1=0.0303, wR2=0.0779 |
Volume/nm3, Z | 1.4156(3), 4 | Absolute structure parameter | 0.19(15) |
Calculated density/(g·cm-3) | 1.212 | Extinction coefficient | 0.0057(8) |
Absorption coefficient/mm-1 | 0.750 | Largest diff. peak and hole/(e·nm-3) | 154 and -192 |
O1—C1 | 0.12349(15) | O4—C8 | 0.13519(13) | N2—C8 | 0.13423(14) |
---|---|---|---|---|---|
O2—C7 | 0.14192(16) | O4—C9 | 0.14592(13) | N2—C6 | 0.14547(14) |
O2—H2A | 0.085(2) | N1—C1 | 0.13377(16) | N2—H2B | 0.0898(16) |
O3—C8 | 0.12269(13) | N1—C4 | 0.14600(16) | C1—C2 | 0.15205(17) |
C1—N1—C4 | 11.358(11) | C1—C2—C3 | 10.300(10) | N2—C6—C5 | 11.042(9) |
C8—N2—C6 | 12.351(9) | C5—C2—C3 | 11.559(10) | C7—C6—C5 | 11.038(9) |
O1—C1—N1 | 12.492(12) | C2—C3—C4 | 10.419(10) | O2—C7—C6 | 11.350(11) |
O1—C1—C2 | 12.610(11) | N1—C4—C3 | 10.244(10) | O3—C8—N2 | 12.589(10) |
N1—C1—C2 | 10.896(10) | C2—C5—C6 | 11.257(9) | O3—C8—O4 | 12.498(10) |
C1—C2—C5 | 11.315(10) | N2—C6—C7 | 10.907(10) | N2—C8—O4 | 10.913(9) |
Table 2 Selected bond lengths(nm) and bond angles(°) of compound 5
O1—C1 | 0.12349(15) | O4—C8 | 0.13519(13) | N2—C8 | 0.13423(14) |
---|---|---|---|---|---|
O2—C7 | 0.14192(16) | O4—C9 | 0.14592(13) | N2—C6 | 0.14547(14) |
O2—H2A | 0.085(2) | N1—C1 | 0.13377(16) | N2—H2B | 0.0898(16) |
O3—C8 | 0.12269(13) | N1—C4 | 0.14600(16) | C1—C2 | 0.15205(17) |
C1—N1—C4 | 11.358(11) | C1—C2—C3 | 10.300(10) | N2—C6—C5 | 11.042(9) |
C8—N2—C6 | 12.351(9) | C5—C2—C3 | 11.559(10) | C7—C6—C5 | 11.038(9) |
O1—C1—N1 | 12.492(12) | C2—C3—C4 | 10.419(10) | O2—C7—C6 | 11.350(11) |
O1—C1—C2 | 12.610(11) | N1—C4—C3 | 10.244(10) | O3—C8—N2 | 12.589(10) |
N1—C1—C2 | 10.896(10) | C2—C5—C6 | 11.257(9) | O3—C8—O4 | 12.498(10) |
C1—C2—C5 | 11.315(10) | N2—C6—C7 | 10.907(10) | N2—C8—O4 | 10.913(9) |
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