Synthesis and characterization of 2-cetyl-3-20 keto acid(N-ethyl perfluorinated octyl sulfonamide) N-ethyl ester

2009 ◽  
Vol 24 (2) ◽  
pp. 292-294
Author(s):  
Rui Weng ◽  
Lianmeng Zhang ◽  
Chonghui Wang ◽  
Shuiping Wang
Keyword(s):  
Ethyl Ester ◽  
Synthesis And Characterization ◽  
Keto Acid

Synthesis and Characterization of Some New 2-Hydroxy-N-(3-Trifluoromethyl-Phenyl)-Benzamide Derivatives

2008 ◽  
Vol 59 (1) ◽  
pp. 56-60
Author(s):  
Ioana M.c. Ienascu ◽  
Alfa X. Lupea ◽  
Iuliana M. Popescu ◽  
Stefan Th. Tomas ◽  
Alina D. Zamfir
Keyword(s):  
Acetic Acid ◽  
Ethyl Ester ◽  
13C Nmr ◽  
Acid Ethyl Ester ◽  
Synthesis And Characterization ◽  
Chemical Methods ◽  
Physico Chemical ◽  
New Compounds ◽  
Benzamide Derivatives

In the reaction between 2-hydroxy-N-(3-trifluoromethyl-phenyl)-benzamide and chloro-acetic acid ethyl ester, [2-(3-trifluoromethyl-phenylcarbamoyl)-phenoxy]-acetic acid ethyl ester was obtained. The ethyl ester was condensed with hydrazine giving 2-hydrazinocarbonylmethoxy-N-(3-trifluoromethyl-phenyl)-benzamide. This hydrazide is considered the key intermediate for the synthesis of new compounds. So, in the reaction between hydrazide and chloro-substituted benzaldehydes hydrazones were obtained. In order to establish their structures, all new synthesized compounds were analyzed by modern physico-chemical methods (FTIR, 1H-NMR, 13C-NMR, MS).

scholarly journals Synthesis and characterization of heterocyclic substituted fluoran compounds

2007 ◽  
Vol 72 (11) ◽  
pp. 1039-1044
Author(s):  
Sachin Patel ◽  
Manish Patel ◽  
Ranjan Patel
Keyword(s):  
Sulphuric Acid ◽  
1H Nmr ◽  
Elemental Analysis ◽  
Synthesis And Characterization ◽  
Spectroscopic Methods ◽  
Keto Acid ◽  
Visible Spectroscopy ◽  
Uv Visible ◽  
Quinazolinone Derivatives

New quinazolinone-substituted fluoran compounds were synthesized by reaction of keto acid, 2?-carboxy-2-hydroxy-4-N-pyrrolidinylbenzophenone with different quinazolinone derivatives in the presence of conc. sulphuric acid. All the synthesized fluoran compounds were characterized by spectroscopic methods (IR, 1H-NMR and UV-visible spectroscopy) and elemental analysis. The fluoran compounds are colorless or nearly colorless and develop color on contact with electron-accepting compounds.

scholarly journals Cyclodextrins in polymer synthesis: Dimethyl-β-cyclodextrin as thermosensitive retardant for the radical polymerization of N-methacryloyl-L-tyrosine derivatives in water

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Monir Tabatabai ◽  
Helmut Ritter ◽  
Monika Schmelzer
Keyword(s):  
Molecular Weight ◽  
Methyl Ester ◽  
Radical Polymerization ◽  
Ethyl Ester ◽  
Room Temperature ◽  
Water Soluble ◽  
Synthesis And Characterization ◽  
Organic Solution ◽  
Tyrosine Derivatives

AbstractThe synthesis and characterization of N-methacryloyl-L-tyrosine methyl ester (3a) and ethyl ester (3b), and their acetyl derivatives O-acetyl-N-methacryloyl- L-tyrosine methyl ester (4a) and ethyl ester (4b) are described. Monomers 3 and 4 were complexed with RAMEB (randomly methylated ß-cyclodextrin) yielding water soluble host-guest complexes 5a-d. The radical polymerization of monomers 3 and 4 was investigated in the presence as well as in the absence of RAMEB in aqueous medium at room temperature and also at 60°C. It is shown that the polymerization tendency of complexes 5a-d at room temperature is lower, leading to polymers of higher molecular weight, compared to the free monomers 3 and 4. Furthermore, the polymerization of monomers 3 and 4 was carried out in homogenous organic solution using 2,2’-azoisobutyronitrile as initiator, and the results are discussed.

Synthesis and characterization of ubiquitin ethyl ester, a new substrate for ubiquitin carboxyl-terminal hydrolase

Biochemistry ◽  
1986 ◽  
Vol 25 (21) ◽  
pp. 6644-6649 ◽  
Author(s):  
Keith D. Wilkinson ◽  
M. Jane Cox ◽  
Alan N. Mayer ◽  
Thomas Frey
Keyword(s):  
Ethyl Ester ◽  
Synthesis And Characterization ◽  
Carboxyl Terminal

Synthesis and characterization of biodegradable polyurethanes made from cholic acid and l-lysine diisocyanate ethyl ester

2019 ◽  
Vol 165 ◽  
pp. 43-48 ◽  
Author(s):  
Gokhan Acik ◽  
Huseyin Riza Ferhat Karabulut ◽  
Cagatay Altinkok ◽  
Ali Osman Karatavuk
Keyword(s):  
Cholic Acid ◽  
Ethyl Ester ◽  
Synthesis And Characterization

Synthesis and characterization of derivatized capped porphyrins

1992 ◽  
Vol 70 (5) ◽  
pp. 1366-1374 ◽  
Author(s):  
Hang Tang ◽  
Tilak P. Wijesekera ◽  
David Dolphin
Keyword(s):  
Ethyl Ester ◽  
Acidic Medium ◽  
Aqueous Alkali ◽  
Synthesis And Characterization ◽  
Methyl Groups ◽  
Pyrrole Derivatives ◽  
Standard Methods ◽  
Hydrophobic Cavity ◽  
Thermal Decarboxylation

The syntheses of porphyrins carrying either a fully hydrophobic cavity with a benzene moiety (32a,b) or a polar cavity with an amidobenzene (32c–d) are described. Terephthaldehyde (1) was converted to benzene-bisalkanoic acids (8, 10) and nitrobenzene-bisalkanoic acids (13 and 16) by using standard methods. The corresponding diacid chlorides 17a–d were used to acylate two equivalents of a β-unsubstituted pyrrole, and the ketonic groups were reduced by diborane. Following the transformation of the nitro function to the acetamide, appropriate modifications of the ethyl ester functions afforded the key bisformylpyrroles 25a–d. The cyanoacrylate-protected formyl pyrrole derivatives were mono-chlorinated at the α-methyl groups and condensed with two equivalents of an α-unsubstitutued pyrrole to give the dipyrromethane dimers. Strong aqueous alkali caused saponification of the two ester groups and deprotection of the formyl functions to produce the dipyrromethane dimer 30, which, after thermal decarboxylation, was cyclized intramolecularly in acidic medium to give the porphyrins 32 (n = 4 or 5, X = H or NHCOCH3).

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