La formation de biphénylènes par pyrolyse de mélanges de précurseurs de benzynes

Martineau, André; DeJongh, Don C.

doi:10.1139/v77-007

Cited by 16 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The heat enthalpy calculation was performed using the TA Instruments Universal Analysis 2000 software. The melting temperature T m determined in this work is lower than the values determined by Morgan et al (366.15 K) and Craig (364.15 to 365.15 K) but is close to the value determined by Martineau et al (361.15 K). The deviation may be due to the difference in equipment, purity, and measured conditions.…”

Section: Resultssupporting

confidence: 79%

See 1 more Smart Citation

Solid–Liquid Phase Equilibria of the Ternary System (2-Naphthaldehyde + 4-Methylphthalic Anhydride + Ethyl Acetate) at (288.15, 298.15, and 308.15) K

Gao

Zhang

et al. 2018

J. Chem. Eng. Data

View full text Add to dashboard Cite

The solubility of 2-naphthaldehyde (2-NA) and 4-methylphthalic anhydride (4-MA) in ethyl acetate at temperatures from 283.15 to 313.15 K and solid−liquid equilibrium of ternary (2-NA + 4-MA + ethyl acetate) system at temperatures of (288.15, 298.15, and 308.15) K were measured under pressure of 101.3 kPa. Three isothermal phase diagrams were plotted according to the ternary solubility data. For the ternary system, two pure 2-NA and 4-MA solids were formed at each temperature and determined by the wet residue method of Schreinemaker. The crystalline region of 2-NA decreases with the increase in temperature, and 4-MA is just the opposite. The crystallization region of 2-NA was found to be smaller than that of 4-MA. The solubility data of the system were correlated and calculated by NRTL and Wilson models. The results show that the NRTL model agrees well with the experimental data compared with the Wilson model. Furthermore, the densities of equilibrium solutions were determined at the corresponding temperatures.

show abstract

Section: Resultssupporting

confidence: 79%

“…Although the melting temperature T m of 4-MA was given in the publications, − the melting enthalpy Δ fus H has not been reported in the present literature. In this work, the melting enthalpy Δ fus H of 4-MA was measured by a differential scanning calorimetry instrument (SDT Q600, TA Instruments, USA) under a nitrogen atmosphere.…”

Section: Methodsmentioning

confidence: 79%

Solid–Liquid Phase Equilibria of the Ternary System (2-Naphthaldehyde + 4-Methylphthalic Anhydride + Ethyl Acetate) at (288.15, 298.15, and 308.15) K

Gao

Zhang

et al. 2018

J. Chem. Eng. Data

View full text Add to dashboard Cite

show abstract

“…DeJonnh and co-workers have develoved a conlOn leave from: Department of Agricultural Chemistry, trolled p~rolysis method (27)(28)(29) and it to…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of bacterial polyalkanoates

Morikawa¹,

Marchessault²

1981

Can. J. Chem.

141

View full text Add to dashboard Cite

HIROMICHI MORIKAWA and ROBERT H. MARCHESSAULT. Can. J. Chem. 59,2306(1981. Pyrolysis products from bacterial polyesters, poly-P-hydroxybutyrate (PHB), and froma heteropolyester(P-hydroxyvalerate and P-hydroxybutyrate) were identified. Different physical forms of PHB were studied: PHB purified by dissolution in chloroform, native granules of PHB, and PHB in bacterial cells. The products were characterized by gc, ms, and nmr analysis. The yield of crotonic acid obtained by the pyrolysis of purified PHB was 60 to 65%. Pyrolysis of PHB native granules yielded crotonic acid as well as oligomers of PHB with a terminal crotonate. Upon direct pyrolysis of dry bacterial cells, the yield of crotonic acid was 20 to 25% of the PHB in the cells. From the heteropolymer, 2-pentenoic acid and terminally unsaturated oligomers of polyhydroxyvalerate were obtained. The usefulness of the pyrolysis method for obtaining vinyl compounds from bacterial cultures containing polyalkanoates is discussed.HIROMICHI MORIKAWA et ROBERT H. MARCHESSAULT. Can. J. Chem. 59,2306(1981. On a identifie les produits provenant de la pyrolyse des polyesters bactiriens poly-P-hydroxybutyrate (PHB) et du polyester heterogene (P-hydroxyvalirate e t P-hydroxybutyrate). On a Ctudie les differentes formes physiques du PHB: le PHB purifie par dissolution dans le chloroforme, les granules naturels de PHB et le PHB des cellules bacteriennes. On acaracterise les produits par chromatographie en phase gazeuse, par spectrometrie de masse et par la rmn. Le rendement en acide crotonique provenant de la pyrolyse du PHB purifie est de 60 a 65%. L a pyrolyse des granules naturels de PHB conduit aussi bien 5 I'acide crotonique qu'a des oligomkres du PHB avec un crotonate terminal. La pyrolyse directe des cellules bacteriennes s6ches conduit a un rendement en acide crotonique qui represente 20 a 25% du PHB contenu dans les cellules. On a obtenu du polymere hkterogkne I'acide penten-2 I oique et des oligomkres du polyhydroxyvalerate insaturk en position terminale. On discute de I'utilite de la methode de pyrolyse en I vue d'obtenir des composes vinyliques a partir des cultures bacteriennes contenant des polyalcanoates.

show abstract

“…Generations of halogenobenzynes such as 3-halogeno-4-methoxybenzynes 5 are unique because in the foregoing cases a thianthrene molecule acts as a leaving group instead of a halogen atom. In fact, halogenoarynes such as halogenobenzynes and halogenonaphthalynes are rare except for tetrahalogenobenzynes whose precursors are tetrahalogenophthalic anhydrides . To demonstrate the usefulness of 5 , compounds 1b − e were treated with 2-aminobenzophenones 7a − f (1.2 equiv) (Chart ) in the presence of LDA (2.0 M in heptane/THF/ethylbenzene) in THF at reflux under a nitrogen atmosphere.…”

mentioning

confidence: 99%

A Convenient Route to Diverse Heterocycles through an Addition of β-Amino Carbonyl Compounds to 3-Halogeno-4-methoxybenzynes

Yoon

Kim

2005

J. Org. Chem.

View full text Add to dashboard Cite

show abstract

La formation de biphénylènes par pyrolyse de mélanges de précurseurs de benzynes

Cited by 16 publications

References 13 publications

Solid–Liquid Phase Equilibria of the Ternary System (2-Naphthaldehyde + 4-Methylphthalic Anhydride + Ethyl Acetate) at (288.15, 298.15, and 308.15) K

Solid–Liquid Phase Equilibria of the Ternary System (2-Naphthaldehyde + 4-Methylphthalic Anhydride + Ethyl Acetate) at (288.15, 298.15, and 308.15) K

Pyrolysis of bacterial polyalkanoates

A Convenient Route to Diverse Heterocycles through an Addition of β-Amino Carbonyl Compounds to 3-Halogeno-4-methoxybenzynes

Contact Info

Product

Resources

About