Thermally induced retro-Claisen rearrangement of formyl-ethynyl-cyclopropanes

ChemInform Abstract: Thermally Induced and Transition Metal Catalyzed Aza-Claisen Rearrangement of 2-Cyclopropylideneethyl Imidates: A New Entry to 1- Aminocyclopropanecarboxylic Acids.

ChemInform ◽

10.1002/chin.199533100 ◽

2010 ◽

Vol 26 (33) ◽

pp. no-no

Author(s):

K. ESTIEU ◽

J. OLLIVIER ◽

J. SALAUEN

Keyword(s):

Transition Metal ◽

Claisen Rearrangement ◽

Thermally Induced ◽

Transition Metal Catalyzed ◽

Metal Catalyzed ◽

New Entry

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ChemInform Abstract: THERMALLY INDUCED RETRO-CLAISEN REARRANGEMENT OF FORMYLETHYNYLCYCLOPROPANES

Chemischer Informationsdienst ◽

10.1002/chin.197947117 ◽

1979 ◽

Vol 10 (47) ◽

Author(s):

F. BOURELLE-WARGNIER ◽

M. VINCENT ◽

J. CHUCHE

Keyword(s):

Claisen Rearrangement ◽

Thermally Induced

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Thermally induced and transition metal catalyzed aza-Claisen rearrangement of 2-cyclopropylideneethyl imidates: A new entry to 1-aminocyclopropanecarboxylic acids

Tetrahedron Letters ◽

10.1016/0040-4039(95)00380-u ◽

1995 ◽

Vol 36 (17) ◽

pp. 2975-2978 ◽

Cited By ~ 13

Author(s):

Karine Estieu ◽

Jean Ollivier ◽

Jacques Salaün

Keyword(s):

Transition Metal ◽

Claisen Rearrangement ◽

Thermally Induced ◽

Transition Metal Catalyzed ◽

Metal Catalyzed ◽

New Entry

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Experiments directed towards the synthesis of anthracyclinones. III. β-Formylation of hydroxyanthraquinones by the Claisen rearrangement

Australian Journal of Chemistry ◽

10.1071/ch9771743 ◽

1977 ◽

Vol 30 (8) ◽

pp. 1743 ◽

Cited By ~ 9

Author(s):

JL Roberts ◽

PS Rutledge

Keyword(s):

Claisen Rearrangement ◽

Allyl Ether ◽

Olefinic Bond ◽

Thermally Induced

β-Formylation of an α-hydroxyanthraquinone is shown to be possible by way of thermally induced rearrangement of the allyl ether, migration of the olefinic bond, and ozonolysis.

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Morphologies of Nonadherent Al2O3 and Matching Substrate Surfaces

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010009587x ◽

1972 ◽

Vol 30 ◽

pp. 524-525

Author(s):

C. S. Giggins ◽

J. K. Tien ◽

B. H. Kear ◽

F. S. Pettit

Keyword(s):

Electron Microscopy ◽

Oxide Scale ◽

Oxidation Resistance ◽

Substrate Surface ◽

Morphological Features ◽

Thermally Induced ◽

Oxide Spallation ◽

Oxidation Resistant ◽

Induced Stresses ◽

Substrate Surfaces

The performance of most oxidation resistant alloys and coatings is markedly improved if the oxide scale strongly adheres to the substrate surface. Consequently, in order to develop alloys and coatings with improved oxidation resistance, it has become necessary to determine the conditions that lead to spallation of oxides from the surfaces of alloys. In what follows, the morphological features of nonadherent Al2O3, and the substrate surfaces from which the Al2O3 has spalled, are presented and related to oxide spallation.The Al2O3, scales were developed by oxidizing Fe-25Cr-4Al (w/o) and Ni-rich Ni3 (Al,Ta) alloys in air at 1200°C. These scales spalled from their substrates upon cooling as a result of thermally induced stresses. The scales and the alloy substrate surfaces were then examined by scanning and replication electron microscopy.The Al2O3, scales from the Fe-Cr-Al contained filamentary protrusions at the oxide-gas interface, Fig. 1(a). In addition, nodules of oxide have been developed such that cavities were formed between the oxide and the substrate, Fig. 1(a).

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Applications of ultramicrotomy for materials characterization

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100147004 ◽

1993 ◽

Vol 51 ◽

pp. 232-233

Author(s):

R.T. Blackham ◽

J.J. Haugh ◽

C.W. Hughes ◽

M.G. Burke

Keyword(s):

Materials Science ◽

Microstructural Analysis ◽

Analytical Electron Microscopy ◽

Austenitic Stainless Steels ◽

Specimen Preparation ◽

Preparation Technique ◽

Thermally Induced ◽

Radiation Induced ◽

Characterization Of Materials

Essential to the characterization of materials using analytical electron microscopy (AEM) techniques is the specimen itself. Without suitable samples, detailed microstructural analysis is not possible. Ultramicrotomy, or diamond knife sectioning, is a well-known mechanical specimen preparation technique which has been gaining attention in the materials science area. Malis and co-workers and Glanvill have demonstrated the usefulness and applicability of this technique to the study of a wide variety of materials including Al alloys, composites, and semiconductors. Ultramicrotomed specimens have uniform thickness with relatively large electron-transparent areas which are suitable for AEM anaysis.Interface Analysis in Type 316 Austenitic Stainless Steel: STEM-EDS microanalysis of grain boundaries in austenitic stainless steels provides important information concerning the development of Cr-depleted zones which accompany M23C6 precipitation, and documentation of radiation induced segregation (RIS). Conventional methods of TEM sample preparation are suitable for the evaluation of thermally induced segregation, but neutron irradiated samples present a variety of problems in both the preparation and in the AEM analysis, in addition to the handling hazard.

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Spin-crossover in an iron(iii) complex showing a broad thermal hysteresis

Dalton Transactions ◽

10.1039/d0dt03610b ◽

2021 ◽

Author(s):

Cyril Rajnák ◽

Romana Mičová ◽

Ján Moncoľ ◽

Ľubor Dlháň ◽

Christoph Krüger ◽

...

Keyword(s):

Schiff Base ◽

Schiff Base Ligand ◽

Spin Crossover ◽

Thermal Hysteresis ◽

Mononuclear Complex ◽

Hysteresis Width ◽

Thermally Induced

A pentadentate Schiff-base ligand 3,5Cl-L2− and NCSe− form a iron(iii) mononuclear complex [Fe(3,5Cl-L)(NCSe)], which shows a thermally induced spin crossover with a broad hysteresis width of 24 K between 123 K (warming) and 99 K (cooling).

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