辅酶Q9的合成

以辅酶Q0为起始原料,经Diels-Aider加成,缩合和逆Dicls-Alder分解反应,合成了辅酶Q10的类似物辅酶Q9,总收率61.9%.中间体和Q9的结构经1H NMR和EI-MS表征.     

天然产物Angustifolin D中间体的合成

以3,4,5-三甲氧基苯甲酸为原料,经6步反应以23％总收率完成了Angustifolin D关键中间体--6,6′-2［(Z)-2-碘代-1-丙烯基］-2,2′,3,3′,4,4′-六甲氧基-1,1′-联苯(7)的合成,其结构经¹H NMR, ¹³C NMR, IR和MS确证。其中关键步骤联苯偶连反应采用了廉价易得的铜试剂(CuBr·SMe₂)作为催化剂。     

In(OTf)3催化下水相合成2-(3,4,5-三甲氧基苯基)-5-[(5-烷硫基-1,3,4-噁二唑-2-基)硫甲基]-1,3,4-噻二唑类衍生物

以2-巯基-5-(3,4,5-三甲氧基苯基)-1,3,4-噻二唑为原料,经醚化、酰肼化、闭环、硫醚化四步反应合成了10个2-(3,4,5-三甲氧基苯基)-5-[(5-烷硫基-1,3,4-噁二唑-2-基)硫甲基]- 1,3,4-噻二唑类衍生物。通过元素分析、IR、MS、1H NMR和 13C NMR对目标化合物进行了表征。采用In(OTf)3催化下40 oC水相合成目标化合物,具有反应条件温和、合成收率高、催化剂可循环使用等特点。     

2-噻吩乙酸的合成

以噻吩为原料,经乙酰基反应、氧化重排生成2-噻吩乙酸甲酯(2),2经水解得2-噻吩乙酸(3),总收率53．0％,其结构经IR和^1H NMR确证。     

麝香酮的合成

以尼龙-11的下脚料11-溴代十一酸为原料,经4步反应合成了DL-麝香酮,总收率32．1％。产物及部分中间体的结构经元素分析、IR,^1H NMR和MS确认。     

麦芽酚及麦芽酚-3-O-β-D-葡萄糖甙的合成

以乙酰丙酮(1)为原料,经溴代、酯化反应得到3-苯甲酰氧基-2,4-戊二酮(2),2与甲酸乙酯缩合、脱水闭环、酯水解得麦芽酚(3),总收率50．4％。3与a一溴代四乙酰化葡萄糖(4)经糖甙化、脱乙酰基得麦芽酚-3-O-β-D-葡萄糖甙(5),收率60．8％,IR,^1H NMR和^13C NMR确证5的葡萄糖为β-构型。中间产物2无须纯化,可实现“一锅”反应合成3。     

7,3′-二甲氧基-4′,5′-次乙二氧基黄烷酮的合成

以香草醛和问苯二酚为原料,经7步反应合成了新的苯并二氧六环新木脂素黄酮类似物7,3′-二甲氧基-4′,5′-次乙二氧基黄烷酮,总收率16．1％,其结构经^1H NMR,IR和MS证实。     

取代氨乙基膦酸的简便合成

以2-氯乙基膦酸和胺为原料，经一步反应合成了3种取代氨乙基膦酸，合成工艺条件为：2-氯乙基膦酸200mmol，n(2-氯乙基膦酸)：n(胺)=1：1．1，反应温度18℃，反应时间120h，pH8～10，KI作催化剂，收率78．2％～91．0％。用元素分析，IR和^1H NMR表征了标题化合物。     

LGK974的合成工艺研究

LGK974是一种高度特异性和有效的Porcupine抑制剂。设计了一条新的合成路线,以2-氨基-5-溴吡啶、2-氯-3-甲基吡啶、2-氨基吡嗪和2-甲基-6-氯吡啶为起始原料,采用汇聚法,经取代、Suzuki、酰胺化等10步反应合成了LGK974,总收率11.5%,其结构经^1H NMR、^13C NMR和MS(ESI-TOF)确证。     

乙拉西坦的合成

2-吡咯烷酮经N-烷基化、氨解反应合成了乙拉西坦,总收率42．6％。其结构经^1H NMR,^13C NMR和IR表征。     

In vitro antioxidant properties of new thiazole derivatives

A series of novel N2-[2-chloro-4(3,4,5-trimethoxy phenyl azetidin-1-yl]-N4-(substituted aryl)-1,3-thiazole-2,4-diamine (4a–g) were synthesized starting from 3,4,5-trimethoxy benzaldehyde thiosemicarbazone (1). The compound (1) was obtained by condensing 3,4,5-trimethoxy benzaldehyde with thiosemicarbazide in methanol. 3,4,5-Trimethoxy benzaldehyde thiosemicarbazone (1) on treatment with chloracetyl chloride afforded 4-chloro-[2-(3,4,5-trimethoxy benzylidine) hydrazinyl]-1,3-thiazole (2). Compound (2) was reacted with chloracetyl chloride and triethylamine to obtain the corresponding 4-chloro-N-[2-chloro-4(3,4,5-trimethoxy phenyl) azetidin-1-yl]-1,3-thiazole-2-amine (3). Various substitutions on compound 3 with secondary amines yielded series of compounds (4a–g). The newly synthesized compounds were characterized by IR, ¹H NMR, elemental analysis and mass spectral studies. All the compounds were screened for their in vitro antioxidant properties. The IC₅₀ values of compounds 3 and 4a–g revealed that some of the synthesized compounds were showing potent antioxidant activity.     

Design and synthesis of novel pinacolylboronate containing combretastatin ‘antimitotic agent’ analogues

We developed a procedure to synthesize pinacolyl boronate containing stilbene derivatives and used this procedure to synthesize boron-containing combretastatin analogues. The key step involves the Wittig reaction of the ylide 4-(4,4,5,5-tetramethyl-1,3,2-dioxaboratophenyl)-methyl triphenylphosphonium bromide 11 with 3,4,5-trimethoxy benzaldehyde in the presence of ^tBuONa in DMF, providing 88% yield. We are now in a position to evaluate the biological activity of these derivatives as modulators of TGF-beta signaling pathways.     

<Emphasis Type="Italic">Atropa belladonna</Emphasis> Hairy Roots: Orchestration of Concurrent Oxidation and Reduction Reactions for Biotransformation of Carbonyl Compounds

The biotransformation potential of a selected Atropa belladonna hairy root clone (AB-09) had been evaluated with regard to three different aromatic carbonyl compounds, i.e., 3,4,5-trimethoxybenzaldehyde (1), 3,4,5-trimethoxyacetophenone (2), and 3,4,5-trimethoxy benzoic acid (3). The results demonstrated for the first time the untapped potentials of the selected hairy root clone to perform simultaneous oxidation (34.49%) and reduction (32.68%) of 3,4,5-trimethoxy benzaldehyde (1) into 3,4,5-trimethoxy benzoic acid (3), and 3,4,5-trimethoxy benzyl alcohol (4), respectively, without any intermediate separation or addition of reagents. The same hairy root clone also demonstrated reduction (<5%) of a 3,4,5-trimethoxyacetophenone (2) into a secondary alcohol, i.e., 1-(3,4,5-trimethoxyphenyl) ethanol (5), while in the case of aromatic carboxylic acid substrate (3), no biotransformation could be obtained under the similar conditions. The current observations revealed oxidation and reduction of the formyl group of the aromatic ring, and only reduction of the carbonyl group of acetophenone through the specific hairy root clone. The concurrent oxidation and reduction reactions by the selected hairy root clone highlight the importance of this study, which, as per our observations, is the first of its kind relating the hairy root culture of A. belladonna.     

2-[5-(3,4,5-三甲氧基苯基)-1,3,4-噻二唑-2-基硫代]-1-(2,3,4-三甲氧基)苯乙酮肟醚合成与抗烟草花叶病毒活性研究

合成了4个2-[5-(3,4,5-三甲氧基苯基)-1,3,4-噻二唑-2-基硫代]-1-(2,3,4-三甲氧)苯乙酮肟醚新化合物, 并经过元素分析、红外光谱、核磁共振氢谱对其结构进行了表征. 初步生物活性测试表明, 化合物具有一定抗烟草花叶病毒活性.     

苯乙烯基取代的缩杂环卓酮类化合物的合成

本文研究了3-(3,4,5-三甲氧基)肉桂酰基卓酚酮和3-(3,4-亚甲二氧基)肉桂酰基卓酚酮与盐酸缩杂环卓酮类化合物, 并用光谱分析和元素分析证明了它们的结构 .     

格氏试剂异构偶联法合成辅酶Q10

报道了一种利用2-甲基-3-氯-4-(2'-甲基-3',4',5',6'-四甲氧基苯)丁烯的格氏试剂与茄尼基溴发生异构偶联, 再氧化合成辅酶Q10的新方法. 发现了烯丙式格氏试剂与卤代烷经过六元环过渡态的异构偶联反应.     

Single-step synthesis of idebenone from Coenzyme Q0 via free-radical alkylation under silver catalysis

Idebenone was synthesized directly by free-radical alkylation of 2,3-dimethyl-1,4-benzoquinone (Coenzyme Q₀) with commercially available 11-hydroxyundecanoic acid in the presence of potassium peroxodisulfate and silver nitrate in a mixed solvent (CH₃CN–H₂O, 1:1) under mild condition in good yields (65%, based on Coenzyme Q₀). The reaction is operationally simple and could be used in the preparation of other biologically Coenzyme Q analogues.     

Interfacial synthesis of bisphenol A tetrachlorocyclotriphosphazene from bisphenol A and hexachlorocyclotriphosphazene

The effect of solvent purity on the synthesis and yield of bisphenol A tetrachlorocyclotriphosphazene (BATCCP) has not been described in the literature. The purpose of this research was to synthesize BATCCP hybrid monomers and to evaluate the effect of solvent purity on the BATCCP production. BATCCP monomers were prepared by an interfacial procedure in a water/toluene system as a function of time with the assistance of a phase transfer catalyst, tetraoctylammonium bromide. ¹H and ³¹P NMR confirmed the production of BATCCP monomer by the appearance of chemical shifts at 7.18 and 5.35 ppm in the ¹H NMR and 23.4 and 13.9 ppm in the ³¹P NMR, respectively. Distillation of the toluene, not suggested in previous reports of HCCP hybrid synthesis, resulted in an improvement of actual % yield to 40% and stability of the product throughout the 1440 min reaction as confirmed by MALDI, compared with an 11% actual yield at 15 min, decaying to 2% over a 1440 min reaction when the synthesis was performed with ‘anhydrous toluene’ as provided commercially without further distillation.     

Synthesis of Tetra- and Triarylantimony Fluorobenzoates

Pentaarylantimonies Ar₅Sb (Ar = Ph, p-Tol) was reacted with triarylantimony bis(perfluorobenzoate) and bis(3,4,5-trifluorobenzoate) in toluene at elevated temperature to obtain tetraarylantimony fluorobenzoates in 90% yield. Triarylantimony bis(fluorobenzoates) were prepared in an yield of up to 98% from triarylstibine and fluorobenzoic acid by oxidative addition in ether in the presence of hydrogen peroxide.