3,4,4-Trichloro-3-butenoates of Certain Terpenols, Sterols, and Plant Phenols

Esters 1b-15b were synthesized by reacting terpenols 1a-7a, sterols 8a-12a, and plant phenols 13a-15a with 3,4,4-trichloro-3-butenyl chloride.     

Synthesis of Some Terpene-Alcohol, Sterol, and Plant Phenol Esters of 4,5-Dichloroisothiazol-3-carboxylic Acid

Previously unknown esters 1b-14b were prepared by reaction of cetyl alcohol 1a, terpene alcohols 2a-6a, sterols 7a-11a, and plant phenols 12a-14a with 4,5-dichloroisothiazol-3-carboxylic acid chloride.     

Synthesis of esters of <Emphasis Type="Italic">m</Emphasis>-C(7)-<Emphasis Type="Italic">iso</Emphasis>-propylcarboran-C(1)-carboxylic acid,natural terpene alcohols,and plant phenols

Previously undescribed esters 1b-21b were prepared by reaction of cetyl alcohol 1a, terpene alcohols 2a-16a, plant phenols 17a-19a, and alcohols 20a and 21a with m-C(7)-iso-propylcarboran-C(1)-carboxylic acid.Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 388–392, September–October, 2004.     

SOME NEW S-, S,S- AND N,S-SUBSTITUTED 2-NITRODIENES AND BUTADIENYL-SUBSTITUTED PIPERAZINES

Nitrodiene 1 reacted with 2a, b and gave the novel compounds 3a, b, 4a, b, and 5a. Monosubstituted diene compound 3a gave the compounds 9a with morpholine, 11a with piperidine, and 13a with homopiperazine. Compound 3a gives the thioether compound 15 by the reaction with the dithiol (HS─(CH₂)₂─O─(CH₂)₂─SH) in ethanol containing sodium hydroxide.     

Synthesis and Spectroscopic Properties of S-,O-Substituted Naphthoquinone Dyes

New S-,O-substituted naphthoquinone compounds (3a, 4b, 6, 7c, 9d, 10, 12, 13c, 14d, 15) were synthesized via vinilic substitution. 2,3-Dichloro-1,4-naphthoquinone gave 3a and 4b with 4,4′-thiobisbenzenethiol, respectively. Compounds 6 and 7c were obtained from the reaction of 2,3-dichloro-1,4-naphthoquinone with cyclohexylmercaptane. The compounds 9d and 10 were prepared from the reaction of 2,3-dichloro-1,4-naphthoquinone with 6-mercapto-1-hexanol. Compounds 12, 13c, 14d, and 15 were synthesized from the reaction of 2,3-dichloro-1,4-naphthoquinone with 1,6-hexanedithiol. Their structures were characterized by micro analysis, FT-IR, ¹H NMR, ¹³C NMR, MS, UV-Vis, and fluorescence spectroscopy.     

New N,S-Derivatives of Nitrodienes from Thioallyl-and Thiodibromopropyl Nitrodienes

Compound 3 and 5a, b were obtained from the reaction of 1,3,4,4-tetrachloro-1-thioallyl-2-nitro-1,3-butadiene (1) with thiomorpholine (2) and piperazine derivatives 4a, b in dichloromethane. The reaction of compound 1 and bromine gave compound 6. Compounds 8 and 10 were obtained from the reaction of 6 with 1-(diphenylmethyl)piperazine (7) and piperidine (9) in dichloromethane. The derivative 13 was synthesized from the reaction of 4-bromo-1,1,3,4-tetrachloro-2-nitro-1,3-butadiene (11) and allylmercaptane (12). Compounds 15 and 16a, b were obtained from the reaction of 1-allyl-4-bromo-1,3,4-trichloro-2-nitro-1,3-butadiene (13) with morpholine (14) and the piperazine derivatives 16a, b, in dichloromethane, respectively.     

含氮五元杂环酮的拟除虫菊酯的合成、结构和生物活性

以1-对乙氧基-2,2-二氯环丙烷甲酸(1a)和3-(2-氯-3,3,3-三氟-1-丙烯)-2,2-二甲基环丙烷甲酸(1b)为原料, 经酰氯化反应得到酰氯, 再以三乙胺为缚酸剂, 分别与2-烷酮、2-噻唑烷酮、2-噻唑硫酮、1-乙酰基-2-咪唑烷酮、1-甲磺酰 基-2-咪唑烷酮反应, 得到10个新的含氮五元杂环酮的拟除虫菊酯. 化合物结构经¹H NMR, IR, MS和元素分析进行表征. 并用X-ray单晶衍射测定了化合物3-(1-对乙氧基-2,2-二氯环丙烷甲酰)-2-噁唑烷酮(4a-1)的晶体结构. 对合成的化合物进行了初步的生物活性测试, 结果表明, 在试验浓度下部分目标化合物对黄瓜灰霉病菌具有一定得防效作用; 其中, 化合物(4a-1)和3-(3-(2-氯-3,3,3-三氟-1-丙烯)-2,2-二甲基环丙烷甲酰)-2-噻唑烷酮(4b-3)对粘虫也分别有50%及90%的杀虫活性.     

NC Palladacycles and C,C-chelating phosphorus ylide complexes: synthesis,X-ray characterization,and comparison of the catalytic activity in the Suzuki-Miyaura reaction

Six secondary amine palladacycles bearing monodentate ligands (1a, 2a), 1,2-bis(diphenylphosphino)ethane (dppe) and 1,3-bis(diphenylphosphino)propane (dppp) containing bridging and bidentate ligands (1b, 2b–d), and four C,C-type phosphorus ylide complexes containing thiourea (tu) (3a), phenyl isothiocyanate (4a), and bridging and terminal azide groups (5 and 5a) have been synthesized. Resulting complexes have been characterized by elemental analyses, IR, ¹H-, ¹³C{¹H}-, and ³¹P{¹H}-NMR spectroscopy with single crystal X-ray structure determination of 1a and 2a. The Pd in 1a and 2a occupies the center of a slightly distorted square planar environment formed by C_aryl, N_amine, N_pyridine, and Cl. The catalytic efficiency of complexes showed that in most cases, amine palladacycles display better catalytic activities than the phosphorus ylide Pd(II) complexes. Comparison between bidentate and bridging dppe complexes showed that dppe-bridged dimer 2d has higher catalytic activity than dppe bidentate complex.     

An Efficient Synthesis of New Substituted Spiro Pyrazolethieno,Pyrimidinethieno, and Benzodiazepinethieno Pyridazine Derivatives with Biological Activities

3-Ethyl 2-amino-4-methyl-5-phenyl thiophene carboxylate 1 was used as a starting material to synthesize 2a,b via coupling with malononitrile or acetyl acetone, respectively. When heated, under reflux in sodium ethoxide solution, 2a,b give 3a,b. On the other hand, when compounds 3a,b were heated under reflux in ethanol with hydrazine hydrate, thiourea, or 1,1-phenylenediamine hydrochloride and a catalytic amount of piperidine 4a,b, 5a,b and 6a,b, were produced, respectively. The new compounds were tested for their antimicrobial activity. Compounds 2a–6b showed antibacterial activities, and 2a,2b and 4b showed antifungal activities.

Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file.     

KINETIC STUDY ON PHOTOISOMERIZATION OF SOME TETRA- AND HEXASUBSTITUTED 4H-THIOPYRANS

Abstract

The effects of phenyl and methyl groups at 3,5-positions of tetrasubstituted 4H-thiopyrans 1a and 1b on photoisomerization are investigated from a kinetic point of view using ¹H-NMR spectroscopy. On irradiation of 1a-1d in benzene-d₆ solution the hexasubstituted 4H-thi-opyrans 1c and 1d, unlike those of the tetrasubstituted analogues 1a and 1b, give the isomeric 2H-thiopyrans 3c and 3d with no detectable signals for intermediates in ¹H-NMR spectra. The photoisomerization of hexasubstituted 4H-thiopyrans 1c and 1d occur with relative rate constants lower than the corresponding tetrasubstituted model compounds 1a and 1b. Moreover, the kinetic comparison of 1a with 1b reveal that the presence of two phenyl groups at 4-position of tetrasubstituted 4H-thiopyran increases the relative rate constant of photoisomerization.     

SYNTHESES,STRUCTURES AND REACTIONS OF NEW AND NOVEL FOUR-, FIVEAND SIX-MEMBERED UNSATURATED N,P-HETEROCYCLE COMPLEXES

Metal-assisted heterocyclic ligand syntheses are reported using 2-H-azaphosphirene complex 1 or 7-phosphanorbornadiene complex 7 as starting material. Thermal decomposition of complex 1 led to 1,2dihydro-1,2,3-azadiphosphete complex 2, which was transformed into 2,6-dihydro-1,3,2,6-diazadiphosphinines 5a, b via ring expansion with carbonitriles 3a, b. Insertion of tert-butyl isonitrile into the P─ P bond of 2 at ambient temperature furnished the first Δ ¹ -1,3,5-azadi-phospholene complex 6─P bond of 2 using 7 failed. The 1,2,3,4-azatriphospholene complexes 9a, b were obtained by thermolysis of complex 2 in the presence of functionalized carbonitriles 8a, b.     

Application of organolithium and related reagents in synthesis,Part XII. Synthesis of phenyl- and pyridylpyridopyridazinones and their derivatives

Summary The preparation of the pyridazinones10a,10b,11a,11b, and12a,12b from the ketoamides7,8, and9 and hydrazine hydrate is described. It was found that from ketoamides8b and9b in addition to the expected pyridopyridazinones11b and12b also aminopyridopyridazines14 and15 were formed and that ketoamide7b gave exclusively aminopyridopyridazine13. The pyridopyridazinones10b,11b, and12b were alkylated with alkyl iodides.

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Anwendungen von Organolithium und verwandten Reagenzien in organischen Synthesen, Teil XII. Synthese von Phenyl- und Pyridylpyridopyridazinonen und ihren Derivaten

Zusammenfassung Die Darstellung der Pyridazinone10a,10b,11a,11b und12a,12b aus Ketoamiden7,8 und9 und Hydrazinhydrat wird beschrieben. Es wurde festgestellt, daß aus Ketoamiden8b und9b außer den erwarteten Pyridopyridazinonen11b und12b auch Aminopyridopyridazine14 und15 enstanden und daß das Ketoamid7b ausschließlich ins Aminopyridopyridazin13 überführt wurde. Die Pyridopyridazinone10b,11b und12b wurden mit Alkyljodiden alkyliert.

     

Über kondensierte Heterocyclen aus β-Isothiocyanatoketonen und Aminoalkoholen bzw. Diaminen

2- and 3-aminoalcohols, o-aminobenzylalcohol, o-hydroxybenzylamine and o-amino(thio)-phenol react with 4-isothiocyanato-4-methyl-2-pentanone (1) to yield derivatives of condensed heterocycles (oxazolopyrimidines7, pyrimidooxazine8, pyrimidobenzoxazines9, 10, pyrimidobenzoxazole11 a and pyrimidobenzothiazole11 c respectively). Ethylenediamine or 1,3-diaminopropane react with1 to yield either imidazo-pyrimidine13 and pyrimidopyrimidine14 respectively or the 1,2-ethylene- and trimethylenebisdihydro-2(1H)-pyrimidinethione15 a, b respectively, according to the molar ratio of the reactants. o-Phenylenediamine gives pyrimidobenzimidazole11 d. 11a undergoes ring cleavage in boiling dimethylformamide followed by methylpyrimidine-pyridine rearrangement to dihydrohydroxyphenylamino-2(1H)-pyridinethione12, while15 a is converted into the bis-4-(ethanediimino)-pyridinthione16.     

NOVEL N,S-SUBSTITUTED DIENES BY THE REACTION OF 2-NITROTHIOSUBSTITUTED HALODIENES AND PRIMARY AMINES

Mono(thio)substituted 1a–c gave compounds 3a–c and 5a with o-toluidin (2) and m-toluidin (4) in ether. Compounds 9a–c and 11a, b were obtained from the reaction of compounds 1a–c with p-fluorophenylamine (8) and p-fluorobenzylamine (10). Compounds 7a and 15c were obtained from the reaction of 1a and 1c with p-phenylendiamine (6) and o-phenylendiamine (14). Compound 13c was synthesized from the reaction of compound 1c with benzidine (2).     

Novel Synthesis of N-Arylpyrrole,Pyrrolo[1,2-a]quinazoline,and Pyrrolo[3,4-d]pyridazine Derivatives

Phenacyl-malononitrile derivatives 1a,b react with dimethyl formamide dimethyl acetal (DMFDMA) in refluxing toluene to afford the enaminones 2a,b respectively. Compounds 2a and 2b react with the aromatic amines (aniline, p-toluidine, p-anisidine) in refluxing ethanol to afford the pyrroles 4a–f and with anthranilonitrile and methyl anthranilate to afford the pyrrolo[1,2-a]quinazolines 5a,b and 6a,b respectively. The pyrrole derivatives 4a–f react with hydrazine hydrate and phenyl hydrazine in refluxing ethanol to afford the pyrrolo[3,4-d] pyridazine derivatives 7a–f and 8a–f respectively.     

Ruthenium(II) carbonyl complexes of P,P and P,O donor diphosphine ligands,Ph2P(CH2)nPPh2 and Ph2P(CH2)nP(O)Ph2, n = 2, 3 and their activities in catalytic transfer hydrogenation reactions

The polymeric precursor [RuCl₂(CO)₂]_n reacts with the ligands, P∩P (a, b) and P∩O (c, d), in 1:1 M ratio to generate six-coordinate complexes [RuCl₂(CO)₂(?²-P∩P)] (1a, 1b) and [RuCl₂(CO)₂(?²-P∩O)] (1c, 1d), where P∩P: Ph₂P(CH₂)_nPPh₂, n = 2(a), 3(b); P∩O: Ph₂P(CH₂)_nP(O)Ph₂, n = 2(c), 3(d). The complexes are characterized by elemental analyses, mass spectrometry, thermal studies, IR, and NMR spectroscopy. 1a–1d are active in catalyzed transfer hydrogenation of acetophenone and its derivatives to corresponding alcohols with turnover frequency (TOF) of 75–290 h^?1. The complexes exhibit higher yield of hydrogenation products than catalyzed by RuCl₃ itself. Among 1a–1d, the Ru(II) complexes of bidentate phosphine (1a, 1b) show higher efficiency than their monoxide analogs (1c, 1d). However, the recycling experiments with the catalysts for hydrogenation of 4-nitroacetophenone exhibit a different trend in which the catalytic activities of 1a, 1b, and 1d decrease considerably, while 1c shows similar activity during the second run.     

Povarov Reaction of Glyoxylate Imines Derived from 12-Aminodehydroabietic Acid

Glyoxylate and arylglyoxal imines based on 12-aminodehydroabietic acid undergo hetero-Diels—Alder (Povarov) reaction with ethyl vinyl ether, cyclopentadiene, and indene to give, respectively, methyl (8aR,9R,12aS)-3-aroyl-5-isopropyl–9,12a-dimethyl–7,8,8a,9,10,11,12,12a-octahydronaphtho[1,2-f]quinoline-9-carboxylates, methyl (7R,10aS,10dR,13aS)-1-aroyl–3-isopropyl–7,10a-dimethyl–2,5,6,6a,7,8,9,10,10a,10d,13,13a-dodecahydro-1H-naphtho[1,2-f]cyclopenta[c]quinoline-7-carboxylates, and methyl (6aS,11bS,11eS,15R,15aR)-6-aroyl–4-isopropyl–11e,15-dimethyl–2,5,6,6a,7,11b,11e,12,13,14,15,15a-1H-dodecahydroindeno[2,1-c]-naphtho[1,2-f]quinoline-15-carboxylates.     

N-1-Naphthyl-3-oxobutanamide in Heterocyclic Synthesis: A Facile Synthesis of Nicotinamide,Thieno[2,3-b]pyridine,and Bi- or Tricyclic Annulated Pyridine Derivatives Containing Naphthyl Moiety

N-1-Naphthyl-3-oxobutanamide (1) reacts with arylidinecyanothioacetamide 2a–c in ethanol/piperidine solution under reflux to yield the pyridine-2(1H)-thiones 6a–c. Compound 6a reacts with α-haloketones 7a–e to give the 6-thio-N-1-naphthyl-nicotinamides derivatives 8a–e, which cyclized to thieno[2,3-b]pyridine derivatives 9a–e. The reaction of compound 9a with hydrazine hydrate and formamide gives the thieno[2,3-b]pyridine carbohydrazide derivative 10 and pyridothienopyrimidine derivative 11, respectively. Reaction of 9a with benzoyl isothiocyanate gave thiourea derivative 12. Compound 12, upon treatment with alcoholic NaOH, gave pyridothienopyrimidine 13. Saponifications of 9a gave the amino acid 15, which affords 16 when refluxed in Ac₂O. Treatment of compound 16 with AcONH₄/AcOH gave 17. Diazotization and self-coupling of 9b gave the pyridothienotriazine 18. Also, diazotization of the ortho-aminohydrazide 10 give the corresponding azide 19, which was subjected to Curtius rearrangement in boiling xylene to give imidazothienopyridine 20. Reaction of 10 with either formic acid or triethylorthoformate and phenyl isothiocyanate gave the corresponding pyridothienotriazepines 22 and 23, respectively. The interaction of 10 with acetylacetone furnished the pyrazolyl derivative 24. The structures of the synthesized compounds were established from their analytical and spectral data.     

Studies on Spiroheterocycles,Part II: Heterocyclization of the Spiro Compounds Containing Cyclohexanone and Thiobarbituric Acid with Different Bidentate Nucleophilic Reagents

The reaction of thiobarbituric acid with different diarylidene ketones 1a–c yields the spiro compounds 2a–c. The diarylidene derivatives 3a–c are synthesized by the condensation of spiro compounds 2a–c with different aldehydes. A series of spiro heterocycles compounds 4a–l, 5a–l, 6a–l, 7a–l, 8a–l, and 9a–l are synthesized from the diarylidene compounds. The structures of the compounds are ascertained from their analytical and spectral data. Some of the compounds are screened for their biological activities.     

ORGANOPHOSPHORUS COMPOUNDS,XXX

Abstract

Fluoroenylidenetriphenylphosphorane (1a) reacts with maleic and phthalic anhydrides to give lactones 2a and 3, respectively. The same reagent (1a) extrudes sulphur from thiophthalic anhydride yielding the spiro-1,3-indandione derivative 4. The infrared and mass spectra of the new products are discussed.