A new electrophilic polymer, 2,4-dinitrophenyl ether of polyvinyl alcohol (PVA-DNP), having a degree of substitution of 0.5 was prepared from polyvinyl alcohol (PVA) and 1-fluro-2,4-dinitrobenzene (DNFB). The PVA-DNP ...A new electrophilic polymer, 2,4-dinitrophenyl ether of polyvinyl alcohol (PVA-DNP), having a degree of substitution of 0.5 was prepared from polyvinyl alcohol (PVA) and 1-fluro-2,4-dinitrobenzene (DNFB). The PVA-DNP polymer was characterized by NMR, IR, and UV-visible spectroscopy. The reaction of PVA-DNP with sodium methoxide was followed by NMR and UV-visible spectroscopy. Evidence of polymer bound spirocyclic SIGMA complex, C-1 and C-3 polymer bound DNP-methoxy SIGMA complexes and the formation and C-1 methoxy complex of 2,4-dinitroanisole was observed.展开更多
Octaphenylsilsesquioxane(OPhS) was prepared by a modifying method and a new core-shell nanocomposite, octa(2,4-dinitrophenyl)silsesquioxane, [(R_2PhSiO_ 1.5)_8, R=—NO_2, ODNPhS], was synthesized by nitration of OPh...Octaphenylsilsesquioxane(OPhS) was prepared by a modifying method and a new core-shell nanocomposite, octa(2,4-dinitrophenyl)silsesquioxane, [(R_2PhSiO_ 1.5)_8, R=—NO_2, ODNPhS], was synthesized by nitration of OPhS in a mixed acid solution of nitric and sulfuric acids at about 60 ℃. Their molecular structures were determined by DRIFTS, 1H NMR, 13C NMR spectra analysis. The thermal analysis shows that ODNPhS is an explosive that detonates at about 420 ℃.展开更多
A new reagent,1(4 antipyriny1) 3(2,4-dinitropheny1)triazene(APDNBT), was synthesized in this lab and its analytical properties and its colour reaction with cadmium were studied.
N- (2,4-Dinitrophenyl)-4-amino-n-butyl aldehyde 3 was obtained with high yield of 80% when N- (2,4-dinitrophenyl)-L-proline 1 reacted with SOCl2 at room temperature. However, the anticipated product N- (2,4-dinitroph...N- (2,4-Dinitrophenyl)-4-amino-n-butyl aldehyde 3 was obtained with high yield of 80% when N- (2,4-dinitrophenyl)-L-proline 1 reacted with SOCl2 at room temperature. However, the anticipated product N- (2,4-dinitrophenyl)-tetrahydropyrrolyl-2- (4-methylthiophenyl) ketone 2 did not be produced. The mechanism was discussed in this article.展开更多
文摘A new electrophilic polymer, 2,4-dinitrophenyl ether of polyvinyl alcohol (PVA-DNP), having a degree of substitution of 0.5 was prepared from polyvinyl alcohol (PVA) and 1-fluro-2,4-dinitrobenzene (DNFB). The PVA-DNP polymer was characterized by NMR, IR, and UV-visible spectroscopy. The reaction of PVA-DNP with sodium methoxide was followed by NMR and UV-visible spectroscopy. Evidence of polymer bound spirocyclic SIGMA complex, C-1 and C-3 polymer bound DNP-methoxy SIGMA complexes and the formation and C-1 methoxy complex of 2,4-dinitroanisole was observed.
文摘Octaphenylsilsesquioxane(OPhS) was prepared by a modifying method and a new core-shell nanocomposite, octa(2,4-dinitrophenyl)silsesquioxane, [(R_2PhSiO_ 1.5)_8, R=—NO_2, ODNPhS], was synthesized by nitration of OPhS in a mixed acid solution of nitric and sulfuric acids at about 60 ℃. Their molecular structures were determined by DRIFTS, 1H NMR, 13C NMR spectra analysis. The thermal analysis shows that ODNPhS is an explosive that detonates at about 420 ℃.
文摘A new reagent,1(4 antipyriny1) 3(2,4-dinitropheny1)triazene(APDNBT), was synthesized in this lab and its analytical properties and its colour reaction with cadmium were studied.
文摘N- (2,4-Dinitrophenyl)-4-amino-n-butyl aldehyde 3 was obtained with high yield of 80% when N- (2,4-dinitrophenyl)-L-proline 1 reacted with SOCl2 at room temperature. However, the anticipated product N- (2,4-dinitrophenyl)-tetrahydropyrrolyl-2- (4-methylthiophenyl) ketone 2 did not be produced. The mechanism was discussed in this article.
文摘目的探讨半抗原二硝基氟苯(dinitrophenyl,DNP)修饰自体肿瘤疫苗在晚期恶性黑色素瘤治疗中的作用。方法 84例Ⅲ期或Ⅳ期可切除恶性黑色素瘤患者随机分为半抗原DNP修饰瘤苗组和半抗原DNP未修饰瘤苗组,每组42例,分别采用半抗原DNP修饰的自体肿瘤疫苗和半抗原DNP未修饰的自体瘤苗联合化疗进行治疗,采用流式细胞技术检测两组患者外周血CD4+CD25+调节性T细胞(regulatory T cell,Treg)数量及淋巴细胞亚群的变化,观察迟发型超敏反应(delayed type hypersensitivity,DTH)及随访生存情况。结果治疗后半抗原DNP修饰瘤苗组患者CD4+-IFN-γPE、CD8+-IFN-γPE淋巴细胞亚群较治疗前及半抗原DNP未修饰瘤苗组明显升高(P均<0.05),而CD4+CD25+Treg数量减少(P<0.05),半抗原DNP未修饰瘤苗组治疗前后无明显变化(P>0.05);半抗原DNP修饰瘤苗组患者较半抗原DNP未修饰瘤苗组DTH明显增强,硬结明显增大,两组DTH达到阳性结果(≥5 mm)的百分比分别为94.6%和45.0%(P<0.05)。半抗原DNP修饰瘤苗组患者1年、2年和3年生存率分别为95.0%、73.0%和65.5%,总生存率(overall survival,OS)为79.3%,无疾病生存率(disease free survival,DFS)为81.1%;半抗原DNP未修饰瘤苗组患者1年、2年和3年生存率分别为90.1%、59.0%和43.5%,OS为64.2%,DFS为74.0%,两组患者生存时间差异有统计学意义(P<0.05)。结论半抗原DNP修饰的自体瘤苗可增强恶性黑色素瘤患者特异性细胞介导的免疫反应,抑制机体免疫耐受,从而延长患者生存时间。
