Thiophene is a heterocyclic compound with the formula C4H4S. (wikipedia.org)
A heterocyclic compound with the formula C 4 H 4 S. Consisting of a stable, flat five-membered ring. (engineeringtoolbox.com)
Thiophene is a five-membered heterocyclic compound containing a sulfur heteroatom with the molecular formula C4H4S. (chemenu.com)
Benzene8
Thiophene was discovered as a contaminant in benzene. (wikipedia.org)
These reagents are contacted with an oxide catalyst at 500-550 °C. At room temperature, thiophene is a colorless liquid with a mildly pleasant odor reminiscent of benzene,[citation needed] with which thiophene shares some similarities. (wikipedia.org)
The high reactivity of thiophene toward sulfonation is the basis for the separation of thiophene from benzene, which are difficult to separate by distillation due to their similar boiling points (4 °C difference at ambient pressure). (wikipedia.org)
Like benzene, thiophene forms an azeotrope with ethanol. (wikipedia.org)
Thiophene is considered to be aromatic, although theoretical calculations suggest that the degree of aromaticity is less than that of benzene. (wikipedia.org)
Commercial refined benzene-535 is free of hydrogen sulfide and sulfur dioxide, but contains a maximum of 1 ppm thiophene and a maximum of 0.15% nonaromatics. (cdc.gov)
Benzene is also commercially available as thiophene-free, 99 mole%, 99.94 mole%, and nanograde quality (HSDB 2007). (cdc.gov)
However, it is the only amide anesthetic that contains a thiophene ring instead of a benzene ring, which accords it more liposolubility, resulting in high tissue penetration and diffusion 3-5 . (bvsalud.org)
Aromatic1
Heating at high temperature (500° to 820 °C) of lacustrine mudstone samples by the Sample Analysis at Mars (SAM) instrument allowed gas chromatography-mass spectrometry (GC-MS) analyses of the evolved gases and the detection of aromatic and aliphatic molecules including several thiophene compounds. (wikipedia.org)
Synthesis2
The first synthesis of thiophene by Meyer, reported the same year that he made his discovery, involves acetylene and elemental sulfur. (wikipedia.org)
Thiophenes are classically prepared by the reaction of 1,4-diketones, diesters, or dicarboxylates with sulfidizing reagents such as P4S10 such as in the Paal-Knorr thiophene synthesis. (wikipedia.org)
Sulfur4
Reflecting their high stabilities, thiophenes arise from many reactions involving sulfur sources and hydrocarbons, especially unsaturated ones. (wikipedia.org)
Specialized thiophenes can be synthesized similarly using Lawesson's reagent as the sulfidizing agent, or via the Gewald reaction, which involves the condensation of two esters in the presence of elemental sulfur. (wikipedia.org)
Oxidation can occur both at sulfur, giving a thiophene S-oxide, as well as at the 2,3-double bond, giving the thiophene 2,3-epoxide, followed by subsequent NIH shift rearrangement. (wikipedia.org)
Thiophenes undergo hydrogenolysis to form hydrocarbons and hydrogen sulfide. (wikipedia.org)
Heteroatom1
Compounds analogous to thiophene include furan (C4H4O), selenophene (C4H4Se) and pyrrole (C4H4NH), which each vary by the heteroatom in the ring. (wikipedia.org)
Acid2
The general formula of a carboxylic acid is R-COOH, with R referring to the rest of the molecule. (engineeringtoolbox.com)
The intermediate (such as an ester of formula (III)) is very suitable for use in a method for the conversion of a steroidal carboxylic acid to a steroidal carbothioic acid or a carbothioate. (allindianpatents.com)
Compounds1
The increased stability of the intermediates (such as compounds of formula (III)) against competing hydrolysis reactions, removes the need to work under anhydrous conditions. (allindianpatents.com)
Carbon1
An organosulfur compound that contains a carbon-bonded sulfhydryl group (-SH), with the general formula R-SH (where R represents an alkyl or other organic substituent). (engineeringtoolbox.com)
Sulfides1
As a consequence of its aromaticity, thiophene does not exhibit the properties seen for conventional sulfides. (wikipedia.org)
Reactions1
The solution is based on the identification by the present inventors that by employing novel in situ generated esters, such as 17ß-carboxy- imidazoryl-, succinimidyl- or triazolyl esters of formula (III), as intermediates, an increased threshold against competing hydrolysis reactions was achieved. (allindianpatents.com)
Substance1
Viktor Meyer was able to isolate thiophene as the actual substance responsible for this reaction. (wikipedia.org)
Stability1
Thiophene ring system has certain stability to oxidant. (chemenu.com)
Product2
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We offer qualified product(1-hydroxybutylidene)propanedinitrile41808-43-9, Formula C7H8N2O.Best Quality,Quick Response,Lower Price. (chemblurb.com)
The preferred steroidal carbothioate end products are defined by formula (I) herein. (allindianpatents.com)
Represents1
When RIO of formula (I) is a fluoromethyl group this represents fluticasone propionate. (allindianpatents.com)
Synonyms1
Name: 5-Methyl-2-[(2-nitrophenyl)amino]thiophene-3-carbonitrile Synonyms: 2-(2-Nitroanilino)-5-methyl-3-thiophene carbonitrile CAS: 138564-59-7 MF: C12H9N3O2S Appearance: white powder Storage:Store in cool and dry place, away from sun light. (lookchem.com)
Benzo2
Thieno[3,2-b]thiophene-Bridged D−π-A Polymer Semiconductor Based on Benzo[1,2-b:4,5-b′]dithiophene and Benzoxadiazole , X. Wang et al. (ossila.com)
Thieno[3,2-b]thiophene-Substituted Benzo[1,2-b:4,5-b′]dithiophene as a Promising Building Block for Low Bandgap Semiconducting Polymers for High-Performance Single and Tandem Organic Photovoltaic Cells, J-H. Kim et al. (ossila.com)
Heterocyclic2
Thiophene is a heterocyclic compound with the formula C4H4S. (wikipedia.org)
A heterocyclic aromatic organic compound with the chemical formula C4H4N2. (bvsalud.org)
Methyl2
Articaine HCl is an amino amide local anesthetic , chemically designated as 4-methyl-3-[2-(propylamino)-propionamido]-2-thiophene-carboxylic acid, methyl ester hydrochloride and is a racemic mixture. (rxlist.com)
R)-4-Methyl-1,3-dioxolan-2-one CAS Number 16606-55-6 CAT Number RF-CC162 Stock Status In Stock, Production Scale Up to Tons Molecular Formula C4H6O3 Molecular Weight 102.09 Condition t. (ruifuchem.com)
Thieno1
A High Mobility P-Type DPP-Thieno[3,2-b]thiophene Copolymer for Organic Thin-Film Transistors, Y. Li et al. (ossila.com)
Derivatives2
Thiophene derivatives have been detected at nanomole levels in 3.5 billions year old Martian soil sediments (Murray Formation, Pahrump Hills) by the rover Curiosity at Gale crater (Mars) between 2012 and 2017. (wikipedia.org)
2-Ethylbutyryl chloride was used in syntheses of bicyclic thiophene derivatives. (sigmaaldrich.com)
Amino1
2021-09-23 trans-4-amino-N-3-quinolinyl-Cyclohexanecarboxamide [2440087-94-3],Linear Formula .Supply advanced organic chemicals. (chemsigma.com)
Molecular1
alpha-Cyclopropylglycine CAS Number 15785-26-9 CAT Number RF-CC253 Stock Status In Stock Molecular Formula C5H9NO2 Molecular Weight 115.13 Melting Po. (ruifuchem.com)
Reaction1
Viktor Meyer was able to isolate thiophene as the actual substance responsible for this reaction. (wikipedia.org)
Price1
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