ChemInform Abstract: TELLURIUM IN ORGANIC SYNTHESIS. 2. ACETOXYMETHYLATION OF BENZENE, TOLUENE, AND RELATED COMPOUNDS WITH TELLURIUM DIOXIDE-ACETIC ACID

1978 ◽  
Vol 9 (49) ◽  
Author(s):  
J. BERGMAN ◽  
L. ENGMAN
Keyword(s):  
Acetic Acid ◽  
Organic Synthesis ◽  
Tellurium Dioxide ◽  
Benzene Toluene ◽  
Related Compounds

PhFl acetic acid: A new linker for solid phase organic synthesis

1998 ◽  
Vol 39 (26) ◽  
pp. 4591-4594 ◽  
Author(s):  
Konrad H. Bleicher ◽  
James R. Wareing
Keyword(s):  
Acetic Acid ◽  
Organic Synthesis ◽  
Solid Phase ◽  
Solid Phase Organic Synthesis

scholarly journals Directed Evolution of Biphenyl Dioxygenase: Emergence of Enhanced Degradation Capacity for Benzene, Toluene, and Alkylbenzenes

2001 ◽  
Vol 183 (18) ◽  
pp. 5441-5444 ◽  
Author(s):  
Hikaru Suenaga ◽  
Mariko Mitsuoka ◽  
Yuko Ura ◽  
Takahito Watanabe ◽  
Kensuke Furukawa
Keyword(s):  
Amino Acids ◽  
Aromatic Hydrocarbons ◽  
Burkholderia Cepacia ◽  
Large Subunit ◽  
Site Directed Mutagenesis ◽  
Biphenyl Dioxygenase ◽  
Pseudomonas Pseudoalcaligenes ◽  
Benzene Toluene ◽  
Related Compounds ◽  
Enhanced Degradation

ABSTRACT Biphenyl dioxygenase (Bph Dox) catalyzes the initial oxygenation of biphenyl and related compounds. Bph Dox is a multicomponent enzyme in which a large subunit (encoded by the bphA1 gene) is significantly responsible for substrate specificity. By using the process of DNA shuffling of bphA1 of Pseudomonas pseudoalcaligenes KF707 and Burkholderia cepaciaLB400, a number of evolved Bph Dox enzymes were created. Among them, anEscherichia coli clone expressing chimeric Bph Dox exhibited extremely enhanced benzene-, toluene-, and alkylbenzene-degrading abilities. In this evolved BphA1, four amino acids (H255Q, V258I, G268A, and F277Y) were changed from the KF707 enzyme to those of the LB400 enzyme. Subsequent site-directed mutagenesis allowed us to determine the amino acids responsible for the degradation of monocyclic aromatic hydrocarbons.

Atmospheric concentrations of formic and acetic acid and related compounds in eastern and northern Austria

1988 ◽  
Vol 22 (12) ◽  
pp. 2841-2850 ◽  
Author(s):  
H. Puxbaum ◽  
C. Rosenberg ◽  
M. Gregori ◽  
C. Lanzerstorfer ◽  
E. Ober ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Atmospheric Concentrations ◽  
Related Compounds

Structure and Conformation of Photosynthetic Pigments and Related Compounds 9 On the Structure and Macrocycle Conformation of Two Copper(II) Rhodochlorin Derivatives and Two Related Rhodoporphyrins

1995 ◽  
Vol 50 (6) ◽  
pp. 969-981 ◽  
Author(s):  
Mathias O. Senge ◽  
Karin Ruhlandt-Senge ◽  
Shwn-Ji H. Lee ◽  
Kevin M. Smith
Keyword(s):  
Crystal Structure ◽  
Acetic Acid ◽  
Formic Acid ◽  
Photosynthetic Pigments ◽  
Dimethyl Ester ◽  
Substituent Effects ◽  
Crystal Data ◽  
Free Base ◽  
The Mean ◽  
Related Compounds

Crystal structure analyses of (rhodochlorinato-15-acetic trimethyl ester)copper(II) 3 and (31, 32-didehydro-rhodochlorinato-15-formic acid trimethyl ester)copper(II) 4 reveal intriguing multiple macrocycle conformations of the metallochlorins in the crystal. The observed conformations range from almost planar macrocycles to distorted macrocycles with individual atoms being displaced up to 0.72 Å from the mean plane. The nonplanar macrocycles show a S4-ruffled macrocycie distortion with significant distortions for the meso-carbons and tilting of the Cb- Cb axes. A comparison with the related free base porphyrins rhodoporphyrin-15- acetic acid trimethyl ester 5 and rhodoporphyrin dimethyl ester 6 shows that the conformational distortion is due to the mixing of metal and substituent effects, hydroporphyrin character, and packing forces. Crystal data: 3, monoclinic, P21, a = 12.096(4) Å, b - 14.307(4) Å, c = 22.343(9) Å , β = 104.94(4)°, Z = 4 (2 indep. mol.), R = 0.069 for 8141 reflections with I > 2.0σ(I); 4, triclinic, P 1, a = 10.528(3) Å . b - 10.646(4) Å, c = 34.026(13) Å, α = 89.81(4)°, β = 88.72(3)°, γ = 60.38(2)°, Z = 4 (4 indep. mol.). R = 0.073 for 9446 reflections with I > 2.5σ(I); 5, triclinic, P 1̄, a = 9.591(2) Å, b = 12.959(4) Å, c = 13.453(4) Å, α = 105.86(2)°, β = 92.67(2)°, γ = 96.12(2)°, Z = 2, R = 0.060 for 4990 reflections with I > 2.5 σ(I); 6, triclinic, P 1̄, a = 8.908(4) Å, b = 12.895(5) Å, c = 13.482(6) Å , α = 102.74(3)°, β = 90.38(4)°, γ = 91.84(3)°, Z = 2, R = 0.089 for 3369 reflections with I > 2.0σ(I).

Pyrimidine Derivatives and Related Compounds, V Synthesis of Some Isoxazolo [2,3-a] pyrimidines. A New Ring System

1977 ◽  
Vol 32 (3) ◽  
pp. 311-314 ◽  
Author(s):  
Mohamed Hilmy Elnagdi ◽  
Ezzat Mohamed Kandeel ◽  
Kamal Usef Sadek
Keyword(s):  
Acetic Acid ◽  
Hydrochloric Acid ◽  
Ethyl Acetoacetate ◽  
Pyrimidine Derivative ◽  
Ring System ◽  
The Other ◽  
Acid Mixture ◽  
Pyrimidine Derivatives ◽  
Benzoyl Isothiocyanates ◽  
Related Compounds

3-Amino-5-phenyl-4-phenylazoisoxazole (1) reacts with ethyl acetoacetate to yield the corresponding ethyl isoxazolylaminocrotonate derivative (2) which could be thermally cyclized into the isoxazolopyrimidine derivative (4). On the other hand, condensation of 1 with ethoxymethylenemalononitrile has resulted in the formation of the aminoethylene derivative (5).Compound 1 reacted with acrylonitrile to yield the isoxazolo[2,3-a]pyrimidine derivative (6). The latter was converted into the corresponding exo derivative (8) by the action of acetic acid-hydrochloric acid mixture.Compound 1 also reacted with methoxycarbonyl-, ethoxycarbomyl- and benzoyl isothiocyanates to yield the isoxazolylthioureas (10a, b) and (11), respectively. The reaction of 2 with acetic acid-hydrochloric acid and with phenylhydrazine is reported.

STUDIES ON RDX AND RELATED COMPOUNDS: II. THE NITROLYSIS OF HEXAMINE IN ACETIC ACID

1950 ◽  
Vol 28b (11) ◽  
pp. 715-719 ◽  
Author(s):  
C. A. Winkler ◽  
M. Kirsch
Keyword(s):  
Acetic Acid ◽  
Nitric Acid ◽  
Deleterious Effect ◽  
Reaction Rate ◽  
Harmful Effect ◽  
Maximum Yield ◽  
Related Compounds

Acetic acid has a harmful effect on the reaction rate and on the yield of RDX at 1 °C. and at 30 °C. for a given nitric acid – hexamine ratio below a certain optimum value. At the optimum, however, the maximum yield of 80% is obtained at both temperatures. The deleterious effect of acetic acid may be explained by assuming that the concentration of the active nitrolyzing agent (nitracidium ion) is decreased by reaction between acetic acid and nitric acid.

Sign in / Sign up

Export Citation Format

Share Document