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介绍了一种简单的制备(1R,3S)-3-氨基1环己烷羧酸的方法。以环己烷-1,3-二羧酸的顺反混合物为原料。经过关环得顺式的酸酐,然后酯化,在脂肪酶AY-30的作用下进行去对称性水解。得光学活性的环己烷-1,3-二羧酸的单乙酯产物,经过改进的Curtis重排反应后,羧酸基团转变为氨基。然后经过酯水解、去保护基团,得到光学纯的(1R,3S)-3-氨基-1-环己烷羧酸。 相似文献
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V. M. Chernyshev V. A. Rakitov V. A. Taranushich V. V. Blinov 《Chemistry of Heterocyclic Compounds》2005,41(9):1139-1146
3-Acylamino-5-amino-1-R-1,2,4-triazoles are formed regioselectively on acylating 3,5-diamino-1-R-1,2,4-triazoles with an equimolar
amount of anhydrides, carboxylic acid chlorides, and sulfonyl chlorides. With an excess of anhydride and carboxylic acid chloride
3,5-diacylamino-1-R-1,2,4-triazoles are formed. 3-Acylamino-5-amino-1-R-1,2,4-triazoles do not interact with sulfonyl chlorides.
The higher reactivity of the 3-amino group towards acylating agents is determined by electronic and not steric factors.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1342–1350, September, 2005. 相似文献
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报道了从3-甲基-2-氨基苯甲酸出发一锅三步合成2-氨基-N,3-二甲基-5-卤代苯甲酰胺的方法.3-甲基-2-氨基苯甲酸(1)与固体光气反应生成中间体8-甲基-2H-3,1-苯并噁嗪-2,4(1H)-二酮(2),化合物2与甲胺水溶液发生胺解反应生成2-氨基-N,3-二甲基苯甲酰胺(3),3再与氯代丁二酰亚胺(NCS)、溴代丁二酰亚胺(NBS)或碘代丁二酰亚胺(NIS)发生芳香亲电取代反应生成目标产物2-氨基-N,3-二甲基-5-卤代苯甲酰胺(4~6).整个反应过程不需分离中间产品,最终产物经减压浓缩除去有机溶剂后,直接从水中析出针状晶体,总收率达到87%~94%,较文献报道的分步法收率提高30%以上.该方法工艺操作简单、反应条件温和、反应时间短、收率高,是一条环境友好的绿色合成路线. 相似文献
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V. M. Chernyshev V. A. Rakitov V. V. Blinov V. A. Taranushich Z. A. Starikova 《Chemistry of Heterocyclic Compounds》2009,45(4):436-444
Alkylation of 3-acylamino-, 5-amino-1-phenyl-3-tosylamino-1,2,4-triazoles and 3,5-diacetylamino-1-phenyl-1,2,4-triazole in
the presence of an equimolar amount of sodium methylate in DMSO occurs regioselectively at the amide (sulfamide) group nitrogen
atom. The benzylation of 3-acetylamino-5-amino-1-phenyl-1,2,4-triazole with excess base and benzyl chloride also alkylates
the amino group at position 5. Alkylamino-1-R-1,2,4-triazoles can be conveniently prepared by alkylation of the corresponding
acetylamino-1,2,4-triazoles in the presence of base and subsequent acid hydrolysis of the N-acetyl-N-alkyl derivatives.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 557–567, April, 2009. 相似文献
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3-氨基-4-氧代氰基呋咱捕获与表征 总被引:1,自引:0,他引:1
3,4-双(4-氨基呋咱-3-基)氧化呋咱由活性中间体3-氨基-4-氧代氰基呋咱分子间发生二聚获得,但3-氨基-4-氧代氰基呋咱不稳定,无法通过分离、纯化及光谱鉴定证实其存在.采用4种不同的烯烃与3-氨基-4-氧代氰基呋咱发生1,3-偶极环加成反应得到3-(4-氨基呋咱-3-基)-5-氰基-Δ2-异噁唑啉、3-(4-氨基呋咱-3-基)-5-乙酰氧基-Δ2-异噁唑啉、3-(4-氨基呋咱-3-基)-5-正丁基-Δ2-异噁唑啉及3-(4-氨基呋咱-3-基)-环己烷并-Δ2-异噁唑啉4种Δ2-异噁唑啉衍生物;采用苯甲酰氯为捕获剂,与3-氨基-4-氧代氰基呋咱反应获得了3-氨基-4-(N-苯甲酸基氨基羰基)呋咱化合物;通过红外光谱、核磁共振光谱、质谱、元素分析表征了5种新化合物的结构,提供了活性中间体3-氨基-4-氧代氰基呋咱存在的间接证据. 相似文献
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Mészáros Szécsényi K. Leovac V. M. Jaćimović Ž. K. Češljević V. I. Kovács A. Pokol G. Gál S. 《Journal of Thermal Analysis and Calorimetry》2001,63(3):723-732
We report the synthesis and the characterization (elemental analysis, FT-IR spectroscopy, thermal methods and molar conductivity
measurements) of the mixed complexes of zinc with acetate and 3-amino-5-methylpyrazole, HL
1, [Zn(OAc)2(HL1)2], or 3-amino-5-phenylpyrazole, HL
2 [Zn(OAc)2(HL2)2], or 4-acetyl-3-amino-5-methylpyrazole, HL
3, [Zn(OAc)(L3)(HL3)]2, with isothiocyanate and HL
2 [Zn(SCN)2(HL2)2], or HL
3 [Zn(SCN)2(HL3)2], and with nitrate, isothiocyanate and 3,5-dimethyl-1-carboxamidinepyrazole, HL
4 [Zn(NO3)(NCS)(HL4)2].
The thermal decomposition of the complexes is generally continuous resulting zinc oxide as end product,except [Zn(OAc)(L3)(HL3)]2 in which case a well-defined intermediate was observed between 570–620 K. On the basis of the IR spectra and elemental analysis
data of the intermediate a decomposition scheme is proposed.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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The first example of homochiral two-dimensional neutral cobalt(Ⅱ)-3-amino-(S)-tyrosine (ATYR) coordination polymer, bis(3-amino-(S)-tyrosinato)cobalt(Ⅱ) 1 was synthesized under the hydrothermal reaction of Co(ClO4)2·6H2O with ATYR in which 1 displays modest second harmonic generation response. 相似文献
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QIAN Hui-Fena② HUANG Weib② LI Hui-Huib YAO Chenga a 《结构化学》2006,25(10):1243-1249
1 INTRODUCTION Chiral amino acids and their versatile derivatives are very useful compounds in many fields[1]. In com- parison with well-documented chiral α and β amino acids and amino alcohols, the studies of chiral γ, δ… ω amino acids and amino alcohols deserve more attention. For example, there have been numerous reports on versatile functions of γ aminobutyric acid (GABA) produced from L-glutamic acid in the presence of L-glutamate decarboxylase (GAD)[2]. However, the stereo… 相似文献
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A. N. Vasiliev Ya. S. Kayukov O. E. Nasakin A. N. Lyshchikov V. N. Nesterov O. V. Kayukova O. V. Poulkherovskaya 《Chemistry of Heterocyclic Compounds》2001,37(3):309-314
An unusual route has been found for the hydrolysis of 3-amino-1,1-dialkoxy-6,7-dialkyl-4-aryl-3a,4,5,7a-tetrahydro-1H-pyrrolo[3,4-c]pyridine-3a,7a-dicarbonitriles in acidic medium which leads to the formation of alkyl 5,6-dialkyl-2-amino-3-cyanopyridine-4-carboxylates. 相似文献
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由具有2位氢的3-氨基-2-烯丙亚胺与N-氯或N-溴琥珀酰亚胺以甲苯作溶剂在常温下反应,制备了-些未见文献报道的2-氯和2-溴-3-氨基-2-烯丙亚胺,化合物结构均经元素分析,^1H NMR,^13C NMR和MS确证。 相似文献
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The reactions of 1-amino-2-phenylethynyl-and 2-acylethynyl-1-amino-9,10-anthraquinones with HNO2 in a mixture of dioxane and a mineral acid at 20 °C were studied. Under these conditions, 2-alkynyl-1-amino-9,10-anthraquinones,
irrespective of the structure of the C=CR substituent, are cyclized into 3-substituted 1H-naphtho[2,3-glindazole-6,11-diones. The nature of the acetylenic group in the initial compound and the choice of the mineral
acid determine the structure of the substitutent in position 3 of the product (1,1-dichloroalkyl or acyl) but have no effect
on the regiospecificity of cyclization.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 110–114, January, 1997. 相似文献
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Alferov K. V. Zhukov Yu. N. Khurs E. N. Osipova T. I. Khomutov R. M. 《Russian Chemical Bulletin》2001,50(2):316-318
A convenient procedure for the synthesis of 1-amino-3-hydroxypropylphosphinic and -phosphonic acids (analogs of homoserine) was developed. The procedure involves the reaction of salts of phosphinic and phosphonic analogs of S-methylmethionine with AcONa/AcOH followed by hydrolysis. 相似文献
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A series of 2-amino-6-(2-oxo-2H-chromen-3-yl)-4-pyridine-3-carbo-nitriles were synthesized by the one-pot, multicomponent reaction of 3-acetyl-coumarin, aromatic aldehydes, malononitrile, and ammonium acetate in acetic acid under microwave irradiation. The reactions were completed in 10–13 min with 61–86% yields, were environmental benign, and had easy workup. Their structures were confirmed by 1H NMR, IR, and MS spectra and elemental analysis. 相似文献
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Stylianos HamilakisAthanase Tsolomitis 《Tetrahedron letters》2003,44(19):3821-3823
Malononitrile has been found to be acylated effectively using N-protected glycines by simultaneous activation of an amino acid carbonyl group and a malononitrile methylene group using carbonyl diimidazole (CDI). The corresponding aminoacetonitriles were isolated as enols and/or as their tautomeric forms, 2-amino-3-cyano-2-pyrrolin-4-ones. 相似文献
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A new method is proposed for the synthesis of 2-amino-4(5H)-oxothiophenes with aryl and hetaryl substituents in position 3 of the molecule by the acylation of aryl- and 2-azahetarylacetonitriles with mercaptoacetic acid ethyl ester.__________Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 202–205, February, 2005. 相似文献
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IR spectra of some N-substituted 2-amino-3-nitro- and 2-amino-4-methyl-5-nitropyridines were measured and interpreted. Assignments and the influence of substituents on the vibration of the pyridine ring were established.Department of Organic Chemistry, Academy of Economics, Pl-53 342 Wroclaw, Poland Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 908–913, July, 2000. 相似文献
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设计了两条新的固相有机合成路线合成了1-氨基-2,4-咪唑二酮化合物4. 一条是由Merrifield树脂负载的羟基苯甲醛1a~1c和氨基脲反应得到缩氨基脲树脂2a~2c, 再在乙醇钠存在下和氯乙酸乙酯成环, 经盐酸切割得到1-氨基-2,4-咪唑二酮; 另一条是将Merrifield树脂用二甲基亚砜氧化氯甲基末端醛化后, 与氨基脲反应得到负载的缩氨基脲6, 经环化、切割得到目标产物4. 这两种方法中用1 mol/L的盐酸代替三氟乙酸作为切割剂, 产物单一、操作简便、可定量反应, 是合成1-氨基-2,4-咪唑二酮化合物的新方法. 相似文献