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醌类衍生物是生命体活动中的重要物质,但是醌类衍生物只有其反式异构体才有生理活性,所以如何实现醌类物质的全反式合成,是其合成研究的热点.二十世纪六十年以来,具有生物活性的醌类衍生物合成的研究不断深入,并取得了很大的进展.作者就醌类衍生物的全反式合成做一概述. 相似文献
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The crystal structures of 1,2-dimethyl-3-indolylmethylidene succinic fulgide anhydride (1) and 1,2-dimethyl-3-indolylethylidene succinic fulgide anhydride(2) were determined by singe crystal X-ray diffraction analysis. The crystal data are C_(18)H_(17)NO_3(1), orthogonal space group Pbca, with a=1.0084(3) nm, b=1.3966(4) nm, c=2.0945(6) nm, V=2.9498(15) nm, Z=8; C_(19)H_(19)NO_3 (2), orthogonal space group Pbca, with a=0.7988(3) nm, b=2.5782(10) nm, c=1.5664(5) nm, V=3.2259(22) nm, Z=8. R values are 0. 047 for (1) and 0.059 for (2) respectively.The photochemical properties of (1) and (2) were reported. Compound (1) is nonphotochromic, compound (2) changed from pale yellow to blue or green on irradiation at 365 nm or on exposure to indoor UV light either in crystal state or in solution (liquid or rigid plastic matrix).The differences in photochromic properties of compound (1) and (2) were discussed. 相似文献
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氮杂俘精酸酐作为光致变色材料近年来已引起人们的极大兴趣,但其晶体结构数据还未见报导.测定它们的晶体结构,研究其结构与性能的关系,有着非常重要的意义.本文测定了标题化合物(Ⅰ)和(Ⅱ)的结构。实验1.从氯仿和石油醚的混合溶剂中培养出黄色单晶.在Nicolet R 3m/E 四圆衍射仪上收集衍射强度数据.用石墨单色器单色化的Mo Kα射线作辐射光源,以θ/2θ扫描方式收集2θ3~50°范围的数据.强度数据没有进行吸收校正.有关晶体数据列于表1中。 相似文献
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The crystal structures of the title compound (Ⅰ) and (Ⅱ) have been determined by X-ray diffraction. Crystal data are: C_(17)H_(15)NO_3(Ⅰ), triclinic, α=0.7308(2) nm, b=0.8845(3) nm, c=1.1323(3) nm, α=100.03(2)°, β=104.81(2)°, γ=97.20(2)°, V=0.6856(3) nm, Z=2, R=0.047 and C_(18)H_(17)NO_3(Ⅱ), monoclinic, a=1.1006(3) nm, b=1.1172(2) nm, c=1.4046(3) nm, β=102.78(2)°, V=1.5337(6) nm, Z=4, R=0.055. The molecular conformation is cis form for compound Ⅰ and trans form for compound(Ⅱ). 相似文献
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