Facile, Ambient Temperature, Double Sn-C Bond Cleavage: Synthesis, Structure, and Electrochemistry of Organotin and Organotellurium Ferrocenecarboxylates

2008 ◽  
Vol 2008 (29) ◽  
pp. 4578-4585 ◽  
Author(s):  
Vadapalli Chandrasekhar ◽  
Ramalingam Thirumoorthi
Keyword(s):  
Ambient Temperature ◽  
Bond Cleavage

Ambient-Temperature Carbon–Oxygen Bond Cleavage of an α-Aryloxy Ketone with Cp2Ti(BTMSA) and Selective Protonolysis of the Resulting Ti–OR Bonds

2012 ◽  
Vol 31 (21) ◽  
pp. 7625-7628 ◽  
Author(s):  
Addison N. Desnoyer ◽  
Beata Fartel ◽  
K. Cory MacLeod ◽  
Brian O. Patrick ◽  
Kevin M. Smith
Keyword(s):  
Ambient Temperature ◽  
Bond Cleavage ◽  
Oxygen Bond

Potential Controlled-Release Herbicides from 2,4-D Esters of Starches

Weed Science ◽  
1974 ◽  
Vol 22 (5) ◽  
pp. 415-418 ◽  
Author(s):  
C. L. Mehltretter ◽  
W. B. Roth ◽  
F. B. Weakley ◽  
T. A. McGuire ◽  
C. R. Russell
Keyword(s):  
Acetic Acid ◽  
Controlled Release ◽  
Ambient Temperature ◽  
Bond Cleavage ◽  
Dichlorophenoxy Acetic Acid ◽  
Acetic Acid Esters ◽  
Acid Esters

Unmodified, cyanoethylated, and crosslinked corn starches were reacted with 2,4-dichlorophenoxyacetyl chloride in pyridine to produce the corresponding 2,4-D [(2,4-dichlorophenoxy)acetic acid]esters of high acyl content. Hydrolysis studies at pH 6 and 8 at ambient temperature showed that these insoluble compositions liberated varying amounts of 2,4-D and soluble 2,4-D esters by ester link and glucoside bond cleavage, respectively, at rates that indicate their possible use as controlled-release herbicides.

Gold-catalyzed dual C–C bond cleavage of biphenylenes bearing a pendant alkyne at ambient temperature

2020 ◽  
Vol 18 (30) ◽  
pp. 5826-5831 ◽  
Author(s):  
Hideaki Takano ◽  
Sari Okazaki ◽  
Shun Nishibe ◽  
Takeharu Ito ◽  
Natsumi Shiozawa ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Room Temperature ◽  
Bond Cleavage ◽  
Gold Catalyst ◽  
Skeletal Rearrangement ◽  
Cationic Gold

We report a catalytic skeletal rearrangement of biphenylenes with a pendant alkyne moiety at room temperature by a cationic gold catalyst, which involves the cleavage of two bonds: the C–C bond of biphenylene and the C(sp)–C(sp2 or sp3) bond.

Visible Light-induced C–C Bond Cleavage in a Multicomponent Reaction Cascade Allowing Acylations of Sulfoximines with Ketones

2021 ◽  
Author(s):  
Yongliang Tu ◽  
Duo Zhang ◽  
Peng Shi ◽  
Chenyang Wang ◽  
Ding Ma ◽  
...  
Keyword(s):  
Visible Light ◽  
Ambient Temperature ◽  
Multicomponent Reaction ◽  
Bond Cleavage ◽  
Photo Catalyst ◽  
Cleavage Reactions

Visible light induces C–C-bond cleavage reactions of ketones, which can be utilized for N-acylations of sulfoximines. No (photo)catalyst is required, and the reactions occur at ambient temperature in air. The...

Generation of Aryllithium Reagents from N-Arylpyrroles Using Lithium

Synthesis ◽  
2021 ◽  
Author(s):  
Tomoya Ozaki ◽  
Atsushi Kaga ◽  
Hayate Saito ◽  
Hideki Yorimitsu
Keyword(s):  
Ambient Temperature ◽  
Bond Cleavage ◽  
Lithium Powder

Treatment of 1-aryl-2,5-diphenylpyrroles with lithium powder at ambient temperature in THF results in the generation of the corresponding aryllithium reagents through reductive C-N bond cleavage.

Ni-catalyzed non-activated C-S bond cleavage at ambient temperature for the synthesis of sulfur-containing polycyclic compounds

2021 ◽  
Author(s):  
Takanori Shibata ◽  
Ayato Sekine ◽  
Mika Akino ◽  
Mamoru Ito
Keyword(s):  
Ambient Temperature ◽  
Bond Cleavage ◽  
Polycyclic Compounds ◽  
Intramolecular Reaction ◽  
Sulfur Containing

A Ni-catalyzed intramolecular reaction of diarylthioether-tethered 1,8-diynes gave sulfur-containing tetracyclic compounds at ambient temperature. The transformation was initiated by non-activated sp2 C-S bond cleavage along with consecutive alkyne insertions. A...

SEM of non-coated hepatocellular cytoskeleton of perfused livers

1984 ◽  
Vol 42 ◽  
pp. 306-307
Author(s):  
S.W. French ◽  
N.C. Benson ◽  
C. Davis-Scibienski
Keyword(s):  
Ambient Temperature ◽  
Critical Point ◽  
Protease Inhibitors ◽  
Metal Deposition ◽  
Heat Damage ◽  
Detergent Extraction ◽  
Cytoskeletal Elements ◽  
Triton X ◽  
Excised Tissue

Previous SEM studies of liver cytoskeletal elements have encountered technical difficulties such as variable metal coating and heat damage which occurs during metal deposition. The majority of studies involving evaluation of the cell cytoskeleton have been limited to cells which could be isolated, maintained in culture as a monolayer and thus easily extracted. Detergent extraction of excised tissue by immersion has often been unsatisfactory beyond the depth of several cells. These disadvantages have been avoided in the present study. Whole C3H mouse livers were perfused in situ with 0.5% Triton X-100 in a modified Jahn's buffer including protease inhibitors. Perfusion was continued for 1 to 2 hours at ambient temperature. The liver was then perfused with a 2% buffered gluteraldehyde solution. Liver samples including spontaneous tumors were then maintained in buffered gluteraldehyde for 2 hours. Samples were processed for SEM and TEM using the modified thicarbohydrazide procedure of Malich and Wilson, cryofractured, and critical point dried (CPD). Some samples were mechanically fractured after CPD.

Formation of Dislocation Channels in Neutron Irradiated Molybdenum

1972 ◽  
Vol 30 ◽  
pp. 672-673
Author(s):  
S. Mahajan
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Ambient Temperature ◽  
Room Temperature ◽  
Channel Formation ◽  
Early Stages ◽  
Transmission Electron ◽  
Three Stages ◽  
Two Stages ◽  
Polycrystalline Molybdenum

The evolution of dislocation channels in irradiated metals during deformation can be envisaged to occur in three stages: (i) formation of embryonic cluster free regions, (ii) growth of these regions into microscopically observable channels and (iii) termination of their growth due to the accumulation of dislocation damage. The first two stages are particularly intriguing, and we have attempted to follow the early stages of channel formation in polycrystalline molybdenum, irradiated to 5×1019 n. cm−2 (E > 1 Mev) at the reactor ambient temperature (∼ 60°C), using transmission electron microscopy. The irradiated samples were strained, at room temperature, up to the macroscopic yield point.Figure 1 illustrates the early stages of channel formation. The observations suggest that the cluster free regions, such as A, B and C, form in isolated packets, which could subsequently link-up to evolve a channel.

Crystallographic Characterization of Dislocation Loops in Irradiated Tungsten

1968 ◽  
Vol 26 ◽  
pp. 290-291
Author(s):  
Robert C. Rau
Keyword(s):  
Electron Microscope ◽  
Ambient Temperature ◽  
Dislocation Loops ◽  
Polycrystalline Specimen ◽  
Post Irradiation ◽  
Neutron Fluences

Previous work has shown that post-irradiation annealing, at temperatures near 1100°C, produces resolvable dislocation loops in tungsten irradiated to fast (E > 1 MeV) neutron fluences of about 4 x 1019 n/cm2 or greater. To crystallographically characterize these loops, tilting experiments were carried out in the electron microscope on a polycrystalline specimen which had been irradiated to 1.5 × 1021 n/cm2 at reactor ambient temperature (∼ 70°C), and subseouently annealed for 315 hours at 1100°C. This treatment produced large loops averaging 1000 Å in diameter, as shown in the micrographs of Fig. 1. The orientation of this grain was near (001), and tilting was carried out about axes near [100], [10] and [110].

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