88970-65-4Relevant academic research and scientific papers
A general platinum-catalyzed alkoxycarbonylation of olefins
Beller, Matthias,Dühren, Ricarda,Franke, Robert,Ge, Yao,Huang, Weiheng,Jackstell, Ralf,Liu, Jiawang,Neumann, Helfried,Schneider, Carolin,Yang, Ji
supporting information, p. 5235 - 5238 (2020/07/30)
Hydroxy- and alkoxycarbonylation reactions constitute important industrial processes in homogeneous catalysis. Nowadays, palladium complexes constitute state-of-the-art catalysts for these transformations. Herein, we report the first efficient platinum-catalysed alkoxycarbonylations of olefins including sterically hindered and functionalized ones. This atom-efficient catalytic transformation provides straightforward access to a variety of valuable esters in good to excellent yields and often with high selectivities. In kinetic experiments the activities of Pd- and Pt-based catalysts were compared. Even at low catalyst loading, Pt shows high catalytic activity.
Development of efficient palladium catalysts for alkoxycarbonylation of alkenes
Liu, Jiawang,Dong, Kaiwu,Franke, Robert,Neumann, Helfried,Jackstell, Ralf,Beller, Matthias
supporting information, p. 12238 - 12241 (2018/11/21)
Herein, we report a general and efficient Pd-catalysed alkoxycarbonylation of sterically hindered and demanding olefins including a variety of tri-, tetra-substituted and 1,1-disubstituted alkenes. In the presence of 1,3-bis(tert-butyl(pyridin-2-yl)phosphanyl)propane L3 or 1,4-bis(tert-butyl(pyridin-2-yl)phosphanyl)butane L4 the desired esters are obtained in good yields and selectivities. Similar transformation is obtained using tertiary ether as showcased in the carbonylation of MTBE to the corresponding linear ester in high yield and selectivity.
Asymmetric Michael Addition Reaction of α-Aryl-Substituted Lactams Catalyzed by Chiral Quaternary Ammonium Salts Derived from Cinchona Alkaloids: A New Short Synthesis of (+)-Mesembrine
Nunokawa, Shiori,Minamisawa, Masamitsu,Nakano, Keiji,Ichikawa, Yoshiyasu,Kotsuki, Hiyoshizo
supporting information, p. 2301 - 2305 (2015/09/28)
The enantioselective Michael addition reaction of α-aryl-substituted lactams with electron-deficient olefins was efficiently catalyzed using chiral quaternary ammonium salts derived from cinchona alkaloids. This method was highly useful for the construction of an all-carbon-substituted quaternary carbon stereogenic center at the α-position of lactams in good to high yields and with good enantiomeric excess and could be applied to the short synthesis of (+)-mesembrine.
CHEMICAL COMPOUNDS ACTING AS PERK INHIBITORS
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Page/Page column 73, (2015/10/05)
The invention is directed to substituted pyrrolidinone derivatives. Specifically, the invention is directed to compounds according to Formula X: wherein R41, R42, R43, R44, R45, R46, and R47 are defined herein. The compounds of the invention are inhibitors of PERK and can be useful in the treatment of cancer and diseases associated with activated unfolded protein response pathways, such as Alzheimer's disease, stroke, diabetes, Parkinson disease, Huntington's disease, Creutzfeldt- Jakob Disease, and related prion diseases, amyotrophic lateral sclerosis, myocardial infarction, neurodegeneration, cardiovascular disease, atherosclerosis, ocular diseases, and arrhythmias, more specifically cancers of the breast, colon, pancreas and lung. Accordingly, the invention is further directed to pharmaceutical compositions comprising a compound of the invention. The invention is still further directed to methods of inhibiting PERK activity and treatment of disorders associated therewith using a compound of the invention or a pharmaceutical composition comprising a compound of the invention.
Synthesis of 3,3-and 4,4-alkyl-phenyl-substituted pyrrolidin-2-one derivatives
Kulig,Ignasik,Malawska
experimental part, p. 1629 - 1636 (2010/07/06)
Syntheses of 3,3-and 4,4-alkyl-phenyl-substituted pyrrolidin-2-one derivatives are described. The final compounds were obtained by the reductive cyclization of relevant cyanoalkanoate esters using NaBH4 and CoCl2.6H2O. The obtained pyrroIidin-2-one derivatives are pharmacophoric fragments for the synthesis of various biologically active compounds.
ARYLOXYALKYLAMINE NK-1/SSRI INHIBITORS
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, (2010/02/15)
The invention encompasses compounds of Formula I, including pharmaceutically acceptable salts and solvates, their pharmaceutical compositions, and their use in treating disorders associated with an excess or imbalance of tachykinins or serotonin or both.
Synthesis of N-Boc-(R)-α-phenyl-γ-aminobutyric acid using an in situ diastereoselective protonation strategy
Calmes, Monique,Escale, Francoise,Martinez, Jean
, p. 293 - 296 (2007/10/03)
The synthesis of (±)-N-phthalyl α-phenyl-γ-aminobutyric acid and its asymmetric transformation via ketene formation have been investigated, allowing, after hydrolysis and amine protection, the preparation of the enantiomerically pure N-Boc-(R)-α-phenyl-γ-
SUBSTITUTED 4-(1H-BENZIMIDAZOL-2-YL)[1,4]DIAZEPANES USEFUL FOR THE TREATMENT ALLERGIC DISEASES
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, (2008/06/13)
The present invention relates to novel 4-(1H-benzimidazol-2-yl)[1,4] diazepane derivatives of formula (1): and stereoisomers thereof, and pharmaceutically acceptable salts thereof which are useful as histamine receptor antagonists and tachykinin receptor antagonist. Such antagonists are useful in the treatment of allergic rhinitis, including seasonal rhinitis and sinusitis; inflammatory bowel diseases, including Crohn's disease and ulcerative colitis; asthma; bronchitis; and emesis.
2-amino-7-(1-substituted-2-hydroxyethyl)-3,5-dihydropyrrolo[3,2-D]pyrimidin-4-ones
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, (2008/06/13)
The invention relates to the 2-amino-7-(1-substituted-2-hydroxyethyl)-3, 5-dihydro-pyrrolo[3,2-d] pyrimidin-4-ones of formula I and tautomers thereof, wherein Ar represents biaryl, carbocyclic or heterocyclic aryl; pharmaceutically acceptable prodrug este
Novel substituted 4-(1H-benzimidazol-2-yl) [1,4]diazepanes useful for the treatment of allergic diseases
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, (2008/06/13)
The present invention relates to novel 4-(1H-benzimidazol-2-yl)[1,4]diazepane derivatives of formula and stereoisomers thereof, and pharmaceutically acceptable salts thereof which are useful as histamine receptor antagonists and tachykinin receptor antagonist. Such antagonists are useful in the treatment of allergic rhinitis, including seasonal rhinitis and sinusitis; inflammatory bowel diseases, including Crohn's disease and ulcerative colitis; asthma; bronchitis; and emesis.
