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| Substracting the peaks correponding to 1,4-isomer (Figure 1A) from Figure 1B leaves the spectrum of the 1,2-isomer, which exhibits four kinds of olefinic hydrogens. The nmr spectral data of N-aryl-1,2-dihydropyridines and N-aryl-1,4-dihydropyridines are summarized in Table 1 and 2, respectively. |
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2楼2011-03-01 10:38:42
houlu666(金币+1): 2011-03-01 12:24:18
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Substracting the peaks correponding to 1,4-isomer (Figure 1A) from Figure 1B leaves the spectrum of the 1,2-isomer, which exhibits four kinds of olefinic hydrogens. The nmr spectral data of N-aryl-1,2-dihydropyridines and N-aryl-1,4-dihydropyridines are summarized in Table 1 and 2, respectively. 从图1B的表现出四种烯烃氢的1,2-异构体光谱中减去1,4-异构体（图1A）的对应峰。对N-芳基- 1,2 -二氢吡啶和N -芳基- 1,4 -二氢吡啶的核磁共振光谱数据分别总结于表1和2。 |
3楼2011-03-01 10:46:25
