39633-51-7Relevant academic research and scientific papers
Supramolecular control of two-dimensional phase behavior
De Feyter, Steven,Larsson, Mattias,Schuurmans, Norbert,Verkuijl, Bas,Zoriniants, George,Gesquiere, Andre,Abdel-Mottaleb, Mohamed M.,Van Esch, Jan,Feringa, Ben L.,Van Stam, Jan,De Schryver, Frans
, p. 1198 - 1206 (2003)
We have used directed two-component self-assembly to "pattern" organic monolayers on the nanometer scale at the liquid/solid interface. The ability of the scanning tunneling microscope to investigate structural details in these adlayers was used to gain insight into the two-component two-dimensional phase behavior. The components are symmetrically alkylated bisurea derivatives (R1-urea-spacer-urea-R2; R1, R2=alkyl, spacer=alkyl or bisthiophene). The bisthiophene unit acts as a marker and its bisurea derivative (T2) is a component in all the mixtures investigated. By varying the position of the hydrogen-bond forming urea groups along the molecule and the length of the alkyl chains of the other components, the effect of 1) hydrogen bonding, 2) molecule length, 3) odd-even effects, and 4) shape complementarity on the two-dimensional phase behavior was investigated. Insight into the effect of these parameters leads to the control of the two-dimensional patterning: from randomly intermixed systems to phase separation.
FLOW CHEMISTRY SYNTHESIS OF ISOCYANATES
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Paragraph 0175; 0185-0187, (2021/06/22)
The disclosure provides, inter alia, safe and environmentally-friendly methods, such as flow chemistry, to synthesize isocyanates, such as methylene diphenyl diisocyanate, toluene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and tetramethylxylene diisocyanate.
New lipophilic isoniazid derivatives and their 1,3,4-oxadiazole analogues: Synthesis, antimycobacterial activity and investigation of their mechanism of action
Vosátka, Rudolf,Krátky, Martin,?varcová, Markéta,Janou?ek, Ji?í,Stola?íková, Ji?ina,Madacki, Jan,Huszár, Stanislav,Miku?ová, Katarína,Korduláková, Jana,Trejtnar, Franti?ek,Vin?ová, Jarmila
, p. 824 - 835 (2018/04/26)
The development of novel drugs is essential for the treatment of tuberculosis and other mycobacterial infections in future. A series of N-alkyl-2-isonicotinoylhydrazine-1-carboxamides was synthesized from isoniazid (INH) and then cyclized to N-alkyl-5-(pyridin-4-yl)-1,3,4-oxadiazole-2-amines. All derivatives were characterised spectroscopically. The compounds were screened for their in vitro antimycobacterial activity against susceptible and multidrug-resistant Mycobacterium tuberculosis (Mtb.) and nontuberculous mycobacteria (NTM; M. avium, M. kansasii). The most active carboxamides were substituted by a short n-alkyl, their activity was comparable to INH with minimum inhibitory concentrations (MICs) against Mtb. of 0.5–2 μM. Moreover, they are non-toxic for HepG2, and some of them are highly active against INH-resistant NTM (MICs ≥4 μM). Their cyclization to 1,3,4-oxadiazoles did not increase the activity. The experimentally proved mechanism of action of 2-isonicotinoylhydrazine-1-carboxamides consists of the inhibition of enoyl-ACP reductase (InhA) in a way similar to INH, which is blocking the biosynthesis of mycolic acids. N-Dodecyl-5-(pyridin-4-yl)-1,3,4-oxadiazol-2-amine as the most efficacious oxadiazole inhibits growth of both susceptible and drug-resistant Mtb. strains with uniform MIC values of 4–8 μM with no cross-resistance to antitubercular drugs including INH. The mechanism of action is not elucidated but it is different from INH. Obtained results qualify these promising derivatives for further investigation.
NOVEL LIPIDS AND NOVEL PHOSPHOLIPIDS STRUCTURES
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Page/Page column 59, (2012/09/22)
The invention relates to a lipids comprising or consisting of 1,3-diamidolipids or/and 1,2-diamidolipids or/and 2,3-diamidolipids or/and 1,3-diurealipids or/and 1,2-diurealipids or/and 2,3-diurealipids or/and 1,3 -dithiourealipids or/and 1,2-dithiourealipids or/and 2,3-dithiourealipids or/and 1,3-diacylurealipids or/and 1,2-diacylurealipids or/and 2,3-diacylurealipids or/and 1 -amidolipids or/and 1-urealipids or/and 1-thiourealipids or/and 1-acylurealipids or/and cyclic-amidolipids or/and cyclic urealipids or/and cyclic thiourealipids or/and cyclic acylurealipids, and their medical and non-medical use.
CHIMIE DES SUCRES SANS GROUPEMENTS PROTECTEURS-II REACTIONS SELECTIVES D'ADDITION DU D-GLUCOSE, DU D-GALACTOSE ET DE D-GLYCOSYLAMINES A DES HETEROCUMULENES
Plusquellec, Daniel,Roulleau, Fabienne,Lefeuvre, Martine,Brown, Eric
, p. 465 - 474 (2007/10/02)
Alkyl isocyanates reacted with 1.5 equivalent of α-methylglucoside, glucose or galactose in pyridine at room temperature, and selectively gave the corresponding 6-N-alkylcarbamates in good yields.The readily available glucosylamine and lactosylamine (1.5-2 eq.) reacted with alkyl isocyanates and isothiocyanates in polar aprotic solvents (pyridine, NMP or DMF), thus affording good yields of the corresponding N-glycosyl N'-alkyl ureas and thioureas.These new sugar derivatives are non-ionic detergents.
