62372-08-1Relevant articles and documents
MAO-B SELECTIVE INHIBITOR COMPOUNDS, PHARMACEUTICAL COMPOSITIONS THEREOF AND USES THEREOF
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Page/Page column 44; sheet 1, (2015/03/16)
Described herein are a series of compounds having the structure of Formula I for use in the inhibition of MAO and uses thereof for the treatment of a barrier disease, obesity, solid epithelial cell tumor metastasis, diabetes, an auto-immune and inflammatory disease or a cardiometabolic disorder.
The importance of the 6- and 7-positions of tetrahydroisoquinolines as selective antagonists for the orexin 1 receptor
Perrey, David A.,Decker, Ann M.,Li, Jun-Xu,Gilmour, Brian P.,Thomas, Brian F.,Harris, Danni L.,Runyon, Scott P.,Zhang, Yanan
, p. 5709 - 5724 (2015/11/11)
Selective antagonism of the orexin 1 (OX1) receptor has been proposed as a potential mechanism for treatment of drug addiction. We have previously reported studies on the structure-activity relationships of tetrahydroisoquinoline-based antagonists. In this report, we elucidated the respective role of the 6- and 7-substitutions by preparation of a series of either 6-substituted tetrahydroisoquinolines (with no 7-substituents) or vice versa. We found that 7-substituted tetrahydroisoquinolines showed potent antagonism of OX1, indicating that the 7-position is important for OX1 antagonism (10c, Ke = 23.7 nM). While the 6-substituted analogs were generally inactive, several 6-amino compounds bearing ester groups showed reasonable potency (26a, Ke = 427 nM). Further, we show evidence that suggests several compounds initially displaying insurmountable antagonism at the OX1 receptor are competitive antagonists with slow dissociation rates.
Activation of electrophilicity of stable Y-delocalized carbamate cations in intramolecular aromatic substitution reaction: Evidence for formation of diprotonated carbamates leading to generation of isocyanates
Kurouchi, Hiroaki,Kawamoto, Kyoko,Sugimoto, Hiromichi,Nakamura, Satoshi,Otani, Yuko,Ohwada, Tomohiko
, p. 9313 - 9328,16 (2012/12/11)
Although cations with three heteroatoms, such as monoprotonated guanidine and urea, are stabilized by Y-shaped conjugation and such Y-conjugated cations are sufficiently basic to be further protonated (or protosolvated) to dications in strongly acid media, only O-monoprotonated species have been detected in the case of carbamates even in magic acid. We found that the trifluoromethanesulfonic acid-catalyzed cyclization of arylethylcarbamates proceeds to afford dihydroisoquinolones in high yield. In strong acids, methyl carbamates are fully O-monoprotonated, and these monocations do not undergo cyclization even under heating. But, as the acidity of the reaction medium is further increased, the cyclization reaction of methyl phenethylcarbamates starts to proceed as a first-order reaction, with a linear relationship between rate and acidity. The sign and magnitude of the entropy of activation ΔS ? were found to be similar to those of other AAc1 reactions. These results strongly support the idea that further protonation of the O-protonated carbamates is involved in the cyclization, but the concentration of the dications is very low and suggests that the rate-determining step is dissociation of methanol from the diprotonated carbamate to generate protonated isocyanate, which reacts with the aromatic ring. Therefore, O-protonated carbamates are weak bases in sharp contrast to other Y-shaped monocations.
A new and efficient route for the synthesis of naturally occurring catecholamines
Bernini, Roberta,Crisante, Fernanda,Barontini, Maurizio,Fabrizi, Giancarlo
experimental part, p. 3838 - 3842 (2010/03/30)
Catecholamines, sympathomimetic drugs and adrenergic receptor antagonists, have been prepared by a regioselective oxidation of the corresponding 4-hydroxyphenethylamine derivatives by 2-iodoxybenzoic acid (IBX) in homogeneous as well as in heterogeneous conditions and followed by cleavage of the amino protective group. By using polymer-supported IBX, after the first oxidation, the oxidant can be recovered, regenerated, and efficiently reused for several additional times. An efficient, easy and green procedure for the synthesis of N-(methoxycarbonyl)dopamine, key component of many pharmaceuticals, has also been reported. Georg Thieme Verlag Stuttgart.
Trapping of carbamic acid species with (trimethylsilyl)diazomethane
Ito, Yoshikatsu,Ushitora, Hiromi
, p. 226 - 235 (2007/10/03)
Methoxycarbonylation of a variety of amines into the corresponding methyl carbamates was accomplished by allowing them to react with (trimethylsilyl) diazomethane TMSCHN2 under bubbling of CO2. The reaction was performed at room temperature for a period of ca. 2 h in benzene-MeOH (4/1 v/v), which was the solvent of choice. In this mixed solvent, undesirable bicarbonate is formed in equilibrium along with carbamate anion. Owing to the irreversibility in the esterification step by TMSCHN2, however, the yield of methyl carbamate can reach very high.
3-Acyl-1,3-diaryltriazenes as neutral and selective acylating agents
?tefane, Bogdan,Ernigoj, Urh,Ko?evar, Marijan,Polanc, Slovenko
, p. 6659 - 6662 (2007/10/03)
New 3-acyl-1,3-diaryltriazenes have been prepared and their reactions with amino compounds have been studied. Reactions proceed rapidly under mild conditions to give the corresponding N-acyl products. Reagents enable chemoselective acylation of aliphatic primary and secondary amines in the presence of other acylable functional groups.
