Unusually long lifetimes of the singlet nitrenes derived from 4-azido-2,3,5,6-tetrafluorobenzamides
摘要:
Laser flash photolysis (308 nm, 20 ns, 150 mJ) of 4-azido-2,3,5,6-tetrafluorobenzamides, esters, and thioesters generates singlet nitrenes which can be intercepted with pyridine to produce strongly absorbing ylides. It was possible to resolve the rate of formation of the ylides as a function of pyridine concentration. This has led to direct measurements of the absolute rate constants of (a) the reaction of the nitrene with pyridine, (b) ring expansion of the nitrene to a ketenimine, and (c) singlet to triplet nitrene intersystem crossing.
Copper-Catalyzed Cross-Coupling Reaction of Organoboron Compounds with Primary Alkyl Halides and Pseudohalides
作者:Chu-Ting Yang、Zhen-Qi Zhang、Yu-Chen Liu、Lei Liu
DOI:10.1002/anie.201008007
日期:2011.4.18
Non‐activated alkylelectrophiles, including alkyl iodides, bromides, tosylates, mesylates, and even chlorides, underwent copper‐catalyzedcross‐coupling with aryl boron compounds and alkyl 9‐BBN reagents (see scheme; 9‐BBN=9‐borabicyclo[3.3.1]nonane). The reactions proceed with practically useful reactivities and thus complement palladium‐ and nickel‐catalyzed Suzuki–Miyaura coupling reactions of alkyl halides
Aqueous Benzylic C–H Trifluoromethylation for Late-Stage Functionalization
作者:Shuo Guo、Deyaa I. AbuSalim、Silas P. Cook
DOI:10.1021/jacs.8b08547
日期:2018.10.3
The installation of trifluoromethylgroups has become an essential step across a number of industries such as agrochemicals, drug discovery, and materials. Consequently, the rapid introduction of this critical functional group in a predictable fashion would benefit current practitioners in those fields. This communication describes a mild trifluoromethylation of benzylic C-H bonds with high selectivity
Nachbargruppeneffekte bei der massenspektrometrischen Fragmentierung: N-Acetyl-?-Phenylalkylamine. 20. Mitteilung �ber das massenspektrometrische verhalten von stickstoffverbindung
作者:Ren� Wild、Manfred Hesse
DOI:10.1002/hlca.19740570219
日期:——
The mass spectral behaviour of the difunctional alkane N-acetyl-4-phenyl-butylamine (3) was investigated. The main fragmentation of compound 3 is caused by the interaction on the two functional groups, which could be shown by comparison of the corresponding monofunctional compounds n-butylbenzene (4) and N-acetyl-n-butylamine (5). On the bases of high resolution data, the analyses of metastable transitions
ACID CERAMIDASE INHIBITORS AND THEIR USE AS MEDICAMENTS
申请人:FONDAZIONE ISTITUTO ITALIANO DI TECHNOLOGIA
公开号:US20150111892A1
公开(公告)日:2015-04-23
The present invention concerns, in a first aspect, compounds of Formula I as defined herein, pharmaceutically acceptable salts thereof and pharmaceutical compositions containing such compounds. The present invention also relates to compounds of Formula I for use as acid ceramidase inhibitors, and in the treatment of cancer and other disorders in which modulation of the levels of ceramide is clinically relevant.
[EN] ACID CERAMIDASE INHIBITORS AND THEIR USE AS MEDICAMENTS<br/>[FR] INHIBITEURS DE LA CÉRAMIDASE ACIDE ET LEUR UTILISATION COMME MÉDICAMENTS
申请人:FOND ISTITUTO ITALIANO DI TECNOLOGIA
公开号:WO2013178576A1
公开(公告)日:2013-12-05
The present invention concerns, in a first aspect, compounds of Formula I as defined herein, pharmaceutically acceptable salts thereof and pharmaceutical compositions containing such compounds. The present invention also relates to compounds of Formula I for use as acid ceramidase inhibitors, and in the treatment of cancer and other disorders in which modulation of the levels of ceramide is clinically relevant.