128-09-6Relevant articles and documents
Electrophilic Substitution of Hydrogen in Betulin and Diacetylbetulin
Bodrikov,Kurskii, Yu. A.,Chiyanov,Subbotin, A. Yu.
, p. 131 - 138 (2018)
Betulin and diacetylbetulin, which can be regarded as sterically hindered alkenes, reacted with N-chloro-, N-bromo-, and N-iodosuccinimides to give products of allylic and vinylic substitution in quantitative overall yield. The contribution of allylic substitution increases in the series Cl Br I. Quantum chemical simulation of the reactions of diacetylbetulin with N-halosuccinimides showed that, regardless of the electrophile power, all reactions involve open-chain carbocationic intermediates. The direction of deprotonation of the latter with formation of allylic or vinylic substitution products is determined by preferential orientation of the vacant orbital and C–Hlg bond.
N-Chlorination rate of five-membered heterocyclic nitrogen compounds
Pastoriza, Cristina,Antelo, Juan Manuel,Amoedo, Francisco Andrés,Parajó, Mercedes
, p. 382 - 393 (2016)
The kinetics of N-chlorination reaction of pyrrolidine, pyrrolidone, succinimide, 5,5,-dimethyloxazolidine-2,4-dione, 5,5-dimethylhydantoin and 1-hydroximethyl-5,5-dimethylhydantoin with HOCl in aqueous solution were studied at 25 °C, constant ionic strength and under isolation conditions in a wide pH range. The set of compounds studied in this paper is characterized by having different functional groups and the same cyclic structure, consisting of a five-member ring with a nitrogen atom in the ring, which is susceptible to be chlorinated. This series of compounds covers nine pKa units, and the kinetic studies allow us to know, like, the presence of an amino, amide or imide group modify the reactivity of nitrogenous compound. Experimental data were fitted to the first-order kinetic equation. All reactions were found to be of first order in both HOCl and nitrogenous compound concentration. Kinetics studies demonstrate that some of these compounds are hydrolyzed in alkaline medium. In each case, reaction mechanism in agreement with the experimental results is proposed. The results were compared with other compounds with similar cyclic structure (2-oxazolidinone and proline). Copyright
CYCLOBUTYL AMIDE MONOACYLGLYCEROL LIPASE MODULATORS
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, (2022/03/31)
Compounds of Formula (I), and pharmaceutically acceptable salts, isotopes, N-oxides, solvates, and stereoisomers thereof, pharmaceutical compositions containing them, methods of making them, and methods of using them including methods for treating disease states, disorders, and conditions associated with MGL modulation, such as those associated with pain, psychiatric disorders, neurological disorders (including, but not limited to depression, major depressive disorder, treatment resistant depression, anxious depression, autism spectrum disorders, Asperger syndrome, and bipolar disorder), cancers and eye conditions: wherein R1, , R3, and L are as defined herein.
4-(IMIDAZO[1,2-A]PYRIDIN-3-YL) -PYRIMIDINE DERIVATIVES
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Page/Page column 159-160, (2021/01/29)
Compounds of the formula (I) in which R1, R2, V, X, Y and Z have the meanings indicated in Claim 1, are inhibitors of c-Kit kinase, and can be employed for the treatment of cancer.
Convenient and environment-friendly synthesis of sulfonyl chlorides from S -alkylisothiourea salts via N-chlorosuccinimide chlorosulfonation
Yang, Zhanhui,Xu, Jiaxi
, p. 1675 - 1682 (2013/07/27)
A convenient, practical, and environmentally friendly method for the synthesis of sulfonyl chlorides has been developed. Structurally diverse sulfonyl chlorides were synthesized in moderate to excellent yields from S-alkylisothiourea salts, which can be easily prepared from readily accessible alkyl halides or mesylates and inexpensive thiourea, via N-chlorosuccinimide chlorosulfonation. In large-scale syntheses, the byproduct succinimide from 'waste water' can be conveniently converted into the starting reagent N-chlorosuccinimide with sodium hypochlorite (bleach) to make the method sustainable. Georg Thieme Verlag Stuttgart, New York.
Preparation of several active N-chloro compounds from trichloroisocyanuric acid
Shiri, Azam,Khoramabadi-Zad, Ahmad
experimental part, p. 2797 - 2801 (2010/01/21)
A very simple method for the preparation of several activeN-chloro compounds that have extensive applications in organic synthesis, industry, and medicine has been developed.Tetrachloroglycolurils, chloramine-T, N-chlorosaccharin, N-chlorosuccinimide, N-chlorophthalimide, N,N¢-dichlorophenobarbital,and N,N¢-dichlorobarbital were synthesized by chlorination with trichloroisocyanuric acid under mild reaction conditions at roomtemperature. This method is clean, fast, and efficient; the yields are also good to excellent. Georg Thieme Verlag Stuttgart.
Conversion of nucleophilic halides to electrophilic halides: Efficient and selective halogenation of azinones, amides, and carbonyl compounds using metal halide/lead tetraacetate
Kim, Jeum-Jong,Kweon, Deok-Heon,Cho, Su-Dong,Kim, Ho-Kyun,Lee, Sang-Gyeong,Yoon, Yong-Jin
, p. 194 - 200 (2007/10/03)
AlCl3/Pb(OAc)4 and ZnBr2/Pb(OAc) 4 are efficient electrophilic N- and α-C-halogenating agents. A variety of azinones, amides and carbonyl compounds were chemoselectively and regioselectively N-, or α-C-halogenated in good to excellent yield using AlCl3/Pb(OAc)4 and ZnBr2/Pb(OAc)4 in acetonitrile. Georg Thieme Verlag Stuttgart.
Xanthine derivatives as DPP-IV inhibitors
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, (2008/06/13)
The present invention provides novel compounds exhibiting an excellent DPPIV inhibition effect. The compounds are represented by the formula: wherein, m is 0 or 1; n is 0; R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, R41, and R42 each represent a hydrogen atom; X represents an alkynyl group, an aryl group, and such, which group may be substituted; and, R1 and R2 each independently represents a hydrogen atom, an alkyl group, an alkoxyl group, or such, or salts or hydrates thereof.
Metal salt catalyzed process to oxazolines and subsequent formation of chloroketones
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, (2008/06/13)
This invention relates to a process for the preparation of an α-chloroketone compound comprising the steps of (i) cyclizing an alkynyl amide to form a 5-methyleneoxazoline STR1 (ii) chlorinating the 5-methyleneoxazoline using trichlorolsocyanuric acid to produce a chlorinated oxazoline intermediate STR2 and (iii) hydrolyzing the chlorinated oxazoline intermediate with an aqueous acid to produce the desired monochloroketone STR3 wherein Z is alkyl or substituted alkyl, aryl or substituted aryl, heteroaryl or substituted heteroaryl or phenylene, R is a hydrogen atom or alkyl, and R1 and R2 are each independently an alkyl or substituted alkyl group, or R1 and R2 together with the carbon atom to which they are attached form a cyclic structure. Additionally, when R is a hydrogen atom, a dichloroketone can be conveniently formed through adjustment of reaction conditions.
Synthesis and solid state and solution characterization of mono- and di-(η1-C) carbamoyl-palladium complexes. New efficient palladium-catalyzed routes to carbamoyl chlorides: Key intermediates to isocyanates, carbamic esters, and ureas
Aresta, Michele,Giannoccaro, Potenzo,Tommasi, Immacolata,Dibenedetto, Angela,Lanfredi, Anna Maria Manotti,Ugozzoli, Franco
, p. 3879 - 3889 (2008/10/08)
The catalytic conversion of primary and secondary amines into isocyanates or carbamoyl chlorides is performed using palladium complexes. The palladium-based catalytic systems is very active and avoids the synthesis of phosgene. The palladium (II) complex