1) With pyridine as catalyst, the yield was raised from 61.6%(under traditional calefaction) to 81.6%(under microwave irradiation), and the reaction time was decreased to 1/100 times.

2) The effects of solvent of Grignard reagent, pyridine hydrochloride and boron tribromide on yield of product were investigated.

3) Objective The bioactivity of twelve novel pyridine ring derivatives of podophyllotoxin were tested against 3rd instar larvae of Culex pipiens pallens.

4) The reaction of molar ratio of pentamer to pyridine and products structure is studied.

5) Recovering pyridine by simple distillation and phase separation with salt was studied.

6) The determination of pyridine adsorption of samples revealed that materials have a typic characterization of proton acid, and the proton acid centers increased with the increase of S content.

7) Pyridine and pyridine production base is also a feed additive main raw material for nicotinic acid.

8) A liquid crystal with pyridine group was synthesized from reactants of pyrogallic acid and isonicotinato by esterification reaction.

9) The pyridine was chemisorbed at both Lewis and Bronsted sites on the glass surface.

10) Place 100 mL of pyridine in a 250-mL graduated cylinder , and, keeping the pyridine cold in an ice bath, pass in dry sulfur dioxide until the volume reaches 200 mL.

11) A semi - empirical LCAO - MO - AM 1 calculation is performed for some substituted pyridine N - oxide.

12) Hyperbranched aromatic polyamides were prepared by direct polycondensations of the two monomers in the presence of triphenyl phosphite and pyridine as condensation agents in NMP.

13) The crude products were purified by neutral alumina column Chromatography with dichloromethane containing pyridine as eluent.

14) Hind of profess to convinced is easy decompose inside bowel reach 5- amino salicylic acid for sulphanilamide pyridine, to colonic wall the organization has affinity,[http:///pyridine.html] have antiphlogistic effect.

15) In this paper the chemical reaction of poly (vinyl pyridine) was studied and the polyelectrolytes CAPVP containing zwitterion structure units were synthesized.

16) The deficiencies of 2-pyridyl organometallics as partners for Pd-coupling reactions and the circumvention of this problem by using stable pyridine N -oxides have been previously highlighted.

17) Synthesis and character of a liquid crystal with groups of pyridine were studied using 3,5- dihydroxytoluene and isonicotinato through esterification reaction.

18) Detailed research contents are as follows:(1) Succeed in selectivity electrochemical fluorinating pyridine, imidazole and 1,2,4-triazole.

19) This paper studied the catalytic N - alkylation of acetanilide with polyvinyl chloride - pyridine resin.

20) In this dissertation, Ir-catalyzed asymmetric hydrogenation of quinoline derivatives, pyridine derivatives and exocyclic enamines have been studied.

21) Our factory specializes in production and operation of organic chemical solvents: tetrahydrofuran. Pyridine. Chloride stupid. DMF.

22) These results indicated that a suitable substituent at the 2-position of pyridine ring and a well-fit group at the 3-position of acrylate were both essential for hi.

23) Aldehyde - ammonia condensation reaction is one of the typical routes to manufacture alkyl pyridine.

24) Employing dealkylation of cumene as the controlling reaction, the authors investigated the poisoning action of pyridine on a silica-alumina catalyst.

25) The process of 2 - chloropyridine chlorination synthesis by pyridine and application were introduced.

26) The typical K - F reagent has disadvantage of high poisonousness and pyridine malodor.

27) Dibenzyl phosphite was synthesized by benzyl alcohol and trichlorophosphorous in the presence of pyridine.

28) A rapid micromethod for the determination of nitrogen in organic compounds, such as pyridine, pyrimidine, purine, thiazole, alkaloids and amino acids, is described.

29) The hemisuccination process and reaction kinetics of stigmasterol with succinic anhydride using toluene as a solvent, pyridine as a catalyst were studied.

30) An intermediate of bone resorption inhibitor risedronate sodium, 3 pyridine acetic acid hydrochloride, was synthesized from ethyl nicotinate via reduction, chlorination, cyanation and hydrolysis.

31) Pyridine is alkaline the production that uses extensively at medicine, pesticide, flavor, balata and dye.

32) In this dissertation, pyridine, pyrrole, quinoline and picoline were selected as model compounds to study the rules in the temperature ranges from 873K to 1623K.

33) The process for the synthesis of pyridine using tetrahydrofurfuryl alcohol(THFA)as material was researched in this article.

34) In the paper, a PVC membrane picric acid anion selective electrode is developed using Bromhexadecyl pyridine picrate ion pair as the active component and dioctyl phthalate as the plasticizer.

35) Triisopropyl phosphite was synthesized and isopropanol using pyridine as an organic base.

36) Three new types of side chain polyviologen, using poly 4-vinyl pyridine as main chain, were synthesized and their electroredox and photoreduction behaviors were investigated.

37) Biaryl substituted pyridine, pyrimidine and pyrazine compounds are sodium channel blockers useful for the treatment of pain.

38) Boron - substituted polyaromatic mesophase prepared by co - pyrolysis of a tar pitch with pyridine - borane complex under autogeneous pressure.

39) Pyrrole, imidazole and furan are biodegradable organics, and pyridine are poor biodegradable organics.

40) The successful synthesis of the aromatic triamine containing pyridine ring laid an important foundation for preparation of a novel hyperbranched polyimide.

41) The manufacture process of nicotinic acid based on ammonia oxidation method, which is introduced in this article, reached 99% conversion of 3-methyl pyridine.

42) The 2,6 dipicrylamino 3,5 dinitro pyridine ( PYX ) pureness reference material had been certificated by potentiometric method.

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43) A charge-transfer salt was synthesized with 12 - molybdophosphoric acid and pyridine in aqueous solution.

44) In the original titrimetric solution, known as Karl Fischer Reagent, the sulfur dioxide and iodine are dissolved in pyridine and methanol.

45) This review described the preparation and application of crosslinked polyvinyl pyridine resins.

46) The main composition of this wastewater is acetaldehyde, paraldehyde, metaldehyde, pyridine and some acetaldehyde polymers.

47) A novel bi - pyridine quaternary ammonium salt cationic surfactants was prepared by acrylic modified rosin.

48) A classical method to determine the content of cinnamaldehyde is called hydrochloride hydroxylamine - pyridine oximation.

49) N-phthaloyl chitosan is able to form cholesteric liquid crystalline phase in concentrated solutions of some organic solvents, including DMF, DMSO, DMAc and pyridine.

50) Boron substituted polyaromatic mesophase was prepared by co pyrolysis of a coal tar pitch with pyridine borane complex under autogeneous pressure.

51) The catalyst was made of zeolite as the active component with boehmite as the carrier. Its activity of olefins removal was tested and solid catalyst surface acidity was measured by pyridine FT-IR.

52) The factory also undertake pyridine derivatives and various solvent distillation process.

53) The urine samples were collected at 7∶00,11∶00 and 15∶00, and were assayed by modified Aldridge ? s method ( pyridine - p - phenylenediamine mixture ) .

54) IR results of pyridine adsorption reveal that supported samples have both Bronsted and Lewis acid centers, and 2-propanol dehydration is a Bronsted acid catalysed reaction.

55) The stable derivative of L-ascorbic acid, L-ascorbic Acid-2-sulphuric acid ester dipotassium salts are synthesized using potassium pyrosulfate as esterifying agent and pyridine as solvent.

56) The catalyst deactivation kinetics of pyridine chlorination was investigated in an integral fixed reactor.

57) In this paper, sizing result of self-fixing cationic rosin neutral sizing agent is probed, which are made from epichlorohydrin, pyridine and triethylamine.

58) This paper introduces the physicochemical property, use, market condition, synthesis method, technology economic index, invest appraisal and economy effect of hydrobromic acid pyridine salt.

59) The organic solvents can impact the activity strongly. The transesterification activity of enzyme in toluene, isooctane and pyridine has been investigated.

60) Urine - Determination of thiocyanate - Pyridine － barbituric acid spectrophotometric method.

61) When dyeing, 3-carboxyl pyridine group disconnects froms-triazine, and the cellulosic carboxylic group reacts withs-triazine rapidly to form a covalent bond, thus effects the colour fixation.

62) The O - acetylation of tri - butyl citrate with acetic anhydride catalyzed by polyvinyl pyridine was explored.

63) It is a heterocyclic compound, containing a pyridine ring; its chemical formula is C10H14N. Nicotine is the chief addictive ingredient (see drug addiction) in cigarettes and cigars and in snuff.

64) In the picoline pyrolysis experiment, the methyl disengages from aromatic ring to form methane firstly, then the following reaction of the aromatic ring is similar to pyridine.

65) And the excess volume of toluene - pyridine was measured with the dilatometer.

66) The HDS, HDN and HDY activities of the catalysts were tested with model compounds consisted of thiophene, dibenzothiophene, pyridine, quinoline, cyclohexene, hexamethylene.

67) Amphiphilic poly(vinyl pyridine)(PVP) with uniform polyoxyethylene(PEO) was synthesized by copolymerization of the PEO macromer with 2-vinyl pyridine in benzene, using AIBN as initiator.

68) In the isodesmic reactions designed for the computation of heats of formation (HOFs), pyrazine and pyridine were chosen as reference compounds.

69) This preparation uses dialkyl imidazole salt, alkyl pyridine salt or caprolactam and fatty acid as reactant.

70) In process of synthesizing N oxidized pyridine, rare earth hetero polyacid was used as catalyst and extortion was canceled.

70)

71) In this thesis, 2-chloro-5-chloromethyl pyridine is ammoniated, which followed by the reaction with N-cyano ethyl ethylimidoate, finally is methylated to gain the objective product.

72) Boron substituted mesophase pitches were synthesized by co pyrolysis of different coal tar pitches with pyridine borane complex.

73) The this paper , some of Heterocycle Compound which including pyridine, imidazole, thiazole, pyrimidine, indol etc, use for pharmaceutical intermediates or raw were summarized.