Beckmann Rearrangement. III. Rearrangement of Oxime p-Toluenesulfonates in Chloroform, Acetic Acid, and Methanol

1961 ◽  
Vol 26 (6) ◽  
pp. 1695-1702 ◽  
Author(s):  
WALTER Z. HELDT
Keyword(s):  
Acetic Acid ◽  
Beckmann Rearrangement

scholarly journals Photochemical and Beckmann rearrangement of (Z)-cholest-4-en-6-one oxime

2004 ◽  
Vol 69 (6) ◽  
pp. 413-420 ◽  
Author(s):  
Natalija Krstic ◽  
Mira Bjelakovic ◽  
Milan Dabovic ◽  
Ljubinka Lorenc ◽  
Vladimir Pavlovic
Keyword(s):  
Acetic Acid ◽  
Acid Solution ◽  
Thionyl Chloride ◽  
Acetic Acid Solution ◽  
Beckmann Rearrangement ◽  
Dioxane Solution ◽  
Single Product

Beckmann rearrangement of (Z)-cholest-4-en-6-one oxime (4) (prepared in 4 steps starting from cholest-5-en-3?-ol ?1)) with thionyl chloride in dioxane solution afforded an enamide-type lactam, i.e. 7-aza-B-homocholest-4-en-6-one (6) as a single product. Photoreaction of the same compound in methanol or benzene-acetic acid solution gave a mixture of products, with the formation of the parent ketone 3 and the occurrence of Z/E isomerization, while the lactam 6 was obtained only when the reaction was performed in methanol and then in very low yield (7%).

Synthesis, Reactions and Spectroscopy of 3-Benzoyl-6-phenylpyridazines of Expected Biological Activity

1999 ◽  
Vol 54 (8) ◽  
pp. 1048-1054 ◽  
Author(s):  
Yvette A . Issac
Keyword(s):  
Acetic Acid ◽  
Biological Activity ◽  
Sulfuric Acid ◽  
Beckmann Rearrangement ◽  
Synthesis Reactions

yielded 3-benzoyl-6-phenylpyridazine (2). Phenyl(6-phenyl-pyridazin-3-yl)methanol (3) has been obtained via NaBH4 reduction of ketone 2. Reaction of 2 with hydroxylamine or its O-alkyl analogue has been found to yield 3-benzoyloxime-6-phenylpyridazine (4) and alkyloximes (5), respectively. Treatment of 4 with a mixture of acetic acid and sulfuric acid afforded ketone 2 again and not the rearranged products (6 or 7). Beckmann rearrangement has however been achieved for 3-benzoyl(O-ethyloxime)-6-phenylpyridazine (5a) and oxime 4 giving solely 3-carboxanilide-6-phenylpyridazine (6), 4-Benzoyloxime-3-phenyl-6-chloropyridazine (17) has been synthesized from the corresponding ketone 16.

Ectodesmata as Revealed By Freeze-Etch Preparations of Plant Epidermal Cell Walls

1973 ◽  
Vol 31 ◽  
pp. 468-469
Author(s):  
N.C. Lyon ◽  
W. C. Mueller
Keyword(s):  
Electron Microscopy ◽  
Acetic Acid ◽  
Nitric Acid ◽  
Oxalic Acid ◽  
Light Microscopy ◽  
Epidermal Cell ◽  
Cell Walls ◽  
Plant Viruses ◽  
Plant Leaves ◽  
Thin Sections

Schumacher and Halbsguth first demonstrated ectodesmata as pores or channels in the epidermal cell walls in haustoria of Cuscuta odorata L. by light microscopy in tissues fixed in a sublimate fixative (30% ethyl alcohol, 30 ml:glacial acetic acid, 10 ml: 65% nitric acid, 1 ml: 40% formaldehyde, 5 ml: oxalic acid, 2 g: mecuric chloride to saturation 2-3 g). Other workers have published electron micrographs of structures transversing the outer epidermal cell in thin sections of plant leaves that have been interpreted as ectodesmata. Such structures are evident following treatment with Hg++ or Ag+ salts and are only rarely observed by electron microscopy. If ectodesmata exist without such treatment, and are not artefacts, they would afford natural pathways of entry for applied foliar solutions and plant viruses.

Increased expression of an amino acid transporter LAT1 in healing of acetic acid-induced chronic gastric ulcer in rats

2001 ◽  
Vol 120 (5) ◽  
pp. A153-A153
Author(s):  
S MIYAMOTO ◽  
K KATO ◽  
Y ISHII ◽  
S ASAI ◽  
T NAGAISHI ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Gastric Ulcer ◽  
Amino Acid ◽  
Amino Acid Transporter ◽  
Chronic Gastric Ulcer ◽  
Acid Transporter

358: Intravesical Botulinum Toxin a Administration Produces Analgesia Against Acetic Acid Induced Bladder Pain Responses in Rats

2004 ◽  
Vol 171 (4S) ◽  
pp. 94-94
Author(s):  
Yao-Chi Chuang ◽  
Naoki Yoshimura ◽  
Chao-Cheng Huang ◽  
Po-Hui Chiang ◽  
Michael B. Chancellor
Keyword(s):  
Acetic Acid ◽  
Botulinum Toxin ◽  
Botulinum Toxin A ◽  
Toxin A ◽  
Bladder Pain ◽  
Pain Responses
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