49802-75-7Relevant academic research and scientific papers
Chiral Aryliodine-Catalyzed Asymmetric Oxidative C-N Bond Formation via Desymmetrization Strategy
Ding, Qiang,He, Huan,Cai, Qian
supporting information, p. 4554 - 4557 (2018/08/09)
An asymmetric oxidative C-N bond-forming reaction is developed using a chiral diiodospirobiindane derivative as the catalyst and mCPBA as a terminal oxidant. The protocol is based on an asymmetric desymmetrization strategy and affords lactams or spirolact
ACYLATED AMINO ACIDS AS ENDOTHELIN ANTAGONISTS
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, (2008/06/13)
Novel acylated amino acids which are antagonists of endothelin are described. Methods for their preparation and pharmaceutical compositions containing them are also included. The compounds are expected to be useful in treating elevated levels of endothelin, acute and chronic renal failure, hypertension, myocardial infarction, myocardial ischemia, cerebral vasospasm, cirrhosis, septic shock, congestive heart failure, endotoxic shock, subarachnoid hemorrhage, arrhythmias, asthma, preeclampsia, atherosclerotic disorders including Raynaud's disease and restenosis, angina, cancer, pulmonary hypertension, ischemic disease, gastric mucosal damage, hemorrhagic shock, ischemic bowel disease, diabetes, head injury, and stroke.
Decarboxylative radical addition to vinylsulphones and vinylphosphonium bromide: Some further novel transformations of geminal (pyridine-2-thiyl) phenylsulphones
Barton,Boivin,Crepon nee da Silva,Sarma,Togo,Zard
, p. 7091 - 7108 (2007/10/02)
Irradiation of O-acyl derivatives 1 of N-hydroxy-2-thiopyridone with visible light in the presence of phenyl vinyl sulphone or vinyl triphenylphosphonium bromide leads to the corresponding adducts 8 and 9 which can undergo a wide variety of further transformations.
THE INVENTION OF NEW RADICAL CHAIN REACTIONS. PART XIII. HIGH YIELDING DECARBOXYLATIVE CHALCOGENATION OF ALIPHATIC AND ALICYCLIC ACIDS
Barton, Derek H.R.,Bridon, Dominique,Zard, Samir Z.
, p. 449 - 462 (2007/10/02)
Irradiation with a tungsten lamp of mixed anhydrides (e.g. 8) derived from aliphatic or alicyclic carboxylic acids and N-hydroxy-2-pyridine thione 3 in the presence of a disulphide, diselenide or ditelluride gives the corresponding chalcogenide (e.g. 9, 10, or 11) in high yield.The process involves a radical decarboxylation followed by SH2 reaction of the intermediate carbon radical on the dichalcogenide.
THE INVENTION OF NEW RADICAL CHAIN REACTIONS. PART VIII. RADICAL CHEMISTRY OF THIOHYDROXAMIC ESTERS; A NEW METHOD FOR THE GENERATION OF CARBON RADICALS FROM CARBOXYLIC ACIDS.
Barton, Derek H. R.,Crich, David,Motherwell, William B.
, p. 3901 - 3924 (2007/10/02)
The aliphatic and alicyclic esters of N-hydroxy-pyridine-2-thione are readily reduced by tributylstannane in a radical chain reaction to furnish nor-alkanes.In the absence of the stannane a smooth decarboxylative rearrangement occurs to give 2-substituted thiopyridines.The radicals present in this reaction provoke with t-butylthiol an efficient radical reaction with formation of nor-alkane and 2-pyridyl-t-butyl disulphide.Similarly these carbon radicals can be captured by halogen atom transfer to give noralkyl chlorides, bromides and iodides.With oxygen in the presence of t-butylthiol the corresponding noralkyl hydroperoxides are formed in another radical chain reaction.
Conversion of Aliphatic and Alicyclic Carboxylic Acids into nor-Hydroperoxides, nor-Alcohols, and nor-Oxo Derivatives using Radical Chemistry
Barton, Derek H. R.,Crich, David,Motherwell, William B.
, p. 242 - 244 (2007/10/02)
Radicals generated from esters of N-hydroxypyridine-2-thione react smoothly with oxygen in the presence of t-butyl thiol to furnish nor-hydroperoxides, from which the corresponding alcohols and carbonyl derivatives can be readily obtained.
