90721-40-7Relevant academic research and scientific papers
Modulation of photochemical oxidation of thioethers to sulfoxides or sulfones using an aromatic ketone as the photocatalyst
Zhao, Bin,Hammond, Gerald B.,Xu, Bo
supporting information, (2021/09/13)
We have developed an eco-friendly and chemo-selective photocatalytic synthesis of sulfoxides or sulfones via oxidation of sulfides (thioethers) at ambient temperature using air or O2 as the oxidant. An inexpensive thioxanthone was used as the photocatalyst. Our method offers excellent chemical yields and good functional group tolerance. The hydrogen bonding between hexafluoro-2-propanol (HFIP) and sulfoxides may play an important role in minimizing the over-oxidization of sulfoxides.
Mild Copper-Catalyzed Addition of Arylboronic Esters to Di- tert -butyl Dicarbonate: An Easy Access to Methyl Arylcarboxylates
Xu, Jin-Di,Su, Xiao-Bo,Wang, Cai,Yao, Li-Wei,Liu, Jing-Hui,Hu, Guo-Qin
supporting information, p. 833 - 837 (2021/02/26)
An efficient copper-catalyzed addition of arylboronic esters to (Boc) 2O was developed. The reaction can be conducted under exceedingly mild conditions and is compatible with a variety of synthetically relevant functional groups. It therefore represents a useful alternative route for the synthesis of methyl arylcarboxylates. A preliminary mechanistic study indicated the involvement of an addition-elimination mechanism.
Palladium-Catalyzed Chlorocarbonylation of Aryl (Pseudo)Halides Through In Situ Generation of Carbon Monoxide
Bismuto, Alessandro,Boehm, Philip,Morandi, Bill,Roediger, Sven
supporting information, p. 17887 - 17896 (2020/08/19)
An efficient palladium-catalyzed chlorocarbonylation of aryl (pseudo)halides that gives access to a wide range of carboxylic acid derivatives has been developed. The use of butyryl chloride as a combined CO and Cl source eludes the need for toxic, gaseous carbon monoxide, thus facilitating the synthesis of high-value products from readily available aryl (pseudo)halides. The combination of palladium(0), Xantphos, and an amine base is essential to promote this broadly applicable catalytic reaction. Overall, this reaction provides access to a great variety of carbonyl-containing products through in situ transformation of the generated aroyl chloride. Combined experimental and computational studies support a reaction mechanism involving in situ generation of CO.
Lewis Acid–Base Interaction-Controlled ortho-Selective C?H Borylation of Aryl Sulfides
Li, Hong Liang,Kuninobu, Yoichiro,Kanai, Motomu
supporting information, p. 1495 - 1499 (2017/02/05)
An iridium/bipyridine-catalyzed ortho-selective C?H borylation of aryl sulfides was developed. High ortho-selectivity was achieved by a Lewis acid–base interaction between a boryl group of the ligand and a sulfur atom of the substrate. This is the first example of a catalytic and regioselective C?H transformation controlled by a Lewis acid–base interaction between a ligand and a substrate. The C?H borylation reaction could be conducted on a gram scale, and with a bioactive molecule as a substrate, demonstrating its applicability to late-stage regioselective C?H borylation. A bioactive molecule was synthesized from an ortho-borylated product by converting the boryl and methylthio groups of the product.
NAPHTHYLACETIC ACIDS
-
Page/Page column 85, (2010/06/15)
The invention is concerned with the compounds of formula (I) and pharmaceutically acceptable salts and esters thereof, wherein X, Q, and R1-R6 are defined in the detailed description and claims. In addition, the present invention relates to methods of manufacturing and using the compounds of formula (I) as well as pharmaceutical compositions containing such compounds. The compounds of formula (I) are antagonists or partial agonists at the CRTH2 receptor and may be useful in treating diseases and disorders associated with that receptor such as asthma.
Analysis of structure-activity relationships for the 'A-region' of N-(4-t-butylbenzyl)-N′-[4-(methylsulfonylamino)benzyl]thiourea analogues as TRPV1 antagonists
Lee, Jeewoo,Kang, Sang-Uk,Kil, Min-Jung,Shin, Myoungyoup,Lim, Ju-Ok,Choi, Hyun-Kyung,Jin, Mi-Kyoung,Kim, Su Yeon,Kim, Sung-Eun,Lee, Yong-Sil,Min, Kyung-Hoon,Kim, Young-Ho,Ha, Hee-Jin,Tran, Richard,Welter, Jacqueline D.,Wang, Yun,Szabo, Tamas,Pearce, Larry V.,Lundberg, Daniel J.,Toth, Attila,Pavlyukovets, Vladimir A.,Morgan, Matthew A.,Blumberg, Peter M.
, p. 4136 - 4142 (2007/10/03)
The structure-activity relationships for the 'A-region' of N-(4-t-butylbenzyl)-N′-[4-(methylsulfonylamino)benzyl]thiourea analogues have been investigated as TRPV1 receptor antagonists. The 2-halogen analogues showed enhanced antagonism compared to the prototype antagonist.
NEW COMPOUNDS
-
Page 136, (2010/02/06)
The present invention relates to new compounds of formula I, (I) a process for their preparation and new intermediates prepared therein, pharmaceutical formulations containing said compounds and to the use of said compounds in therapy.
NEW COMPOUNDS
-
Page/Page column 60, (2010/11/30)
The present invention relates to new compounds of formula (I), wherein P, Q, X1, X2, X3, X4, R, R1, R2, R3, R4, R5, R6, R7, m, n, o, p and q are defined as in any one of claims 1 to 12, a process for their preparation and new intermediates prepared therein, pharmaceutical formulations containing said compounds and to the use of said compounds in therapy.
Syntheses of Mercaptobenzoic Acids and Mercaptopyridines Using Elemental Sulfur in the Presence of NaOH-KOH
Kamiyama, Tsutomu,Enomoto, Saburo,Inoue, Masami
, p. 5184 - 5189 (2007/10/02)
Mercaptobenzoic acids and mercaptopyridines were synthesized by using mercaptylation of halogeno compounds with elemental sulfur in the presence of molten salts (NaOH-KOH).This procedure was also applied to the preparation of selenoaryl compounds by using elemental selenium.Based on the behavior of the molten salts and sulfur, Na2S and K2S were considered to be the active species for the mercaptylation.KEYWORDS-mercaptylation; molten salt; o-mercaptobenzoic acid; o-selenobenzoic acid; 2-mercaptopyridine
