Orientation-Dependent Electron Transfer Processes in Fullerene−Aniline Dyads
摘要:
Newly synthesized ortho- and para-substituted fullerene-aniline dyads exhibit orientation-dependent electron transfer under photoexcitation. Minimum energy conformation based on molecular mechanics calculations yield folded conformations for ortho-substituted dyads and extended ones for the para-substituted dyads. H-1 NMR studies also provided evidence for the folding of the anilinic group in the case of ortho-substituted dyads, Through-space charge transfer processes in these dyads were investigated using steady state fluorescence and lifetime measurements. The decrease in the spatial distance between the donor and acceptor moieties of the ortho-substituted dyads facilitated an efficient electron transfer. The marked increase in the singlet excited state deactivation rate constants and quantum yields of charge separation observed in the case of the ortho-substituted dyads, in polar solvents, further support a topographically controlled electron transfer process.
Catalytic Formal Hydroamination of Allylic Alcohols Using Manganese PNP‐Pincer Complexes
作者:Leandro Duarte de Almeida、Florian Bourriquen、Kathrin Junge、Matthias Beller
DOI:10.1002/adsc.202100081
日期:2021.9.7
Several manganese-PNP pincer catalysts for the formal hydroamination of allylicalcohols are presented. The resulting γ-amino alcohols are selectively obtained in high yields applying Mn-1 in a tandem process under mild conditions.
Manganese-Catalyzed Anti-Markovnikov Hydroamination of Allyl Alcohols via Hydrogen-Borrowing Catalysis
作者:Kuhali Das、Koushik Sarkar、Biplab Maji
DOI:10.1021/acscatal.1c01199
日期:2021.6.18
In this article, a selective formal anti-Markovnikov hydroamination of allyl alcohols is presented. It enables the versatile synthesis of valuable γ-amino alcohol buildingblocks. A phosphine-free Earth’s abundant manganese(I) complex catalyzed the reaction under hydrogen-borrowing conditions. A vast range of aliphatic, aromatic amines, drug molecules, and naturalproduct derivatives underwent successful
Ln(III)trifluoromethansulfonates in CH2Cl2 efficiently catalyze the aminolysis of trimethylene oxide, 2-octyl-, and 2-phenyloxetane, at r.t., to give the corresponding γ-amino alcohols in very good yields.
Iron-Catalyzed Anti-Markovnikov Hydroamination and Hydroamidation of Allylic Alcohols
作者:Wei Ma、Xiaohui Zhang、Juan Fan、Yuxuan Liu、Weijun Tang、Dong Xue、Chaoqun Li、Jianliang Xiao、Chao Wang
DOI:10.1021/jacs.9b05221
日期:2019.8.28
nonpolar solvent, features exclusive anti-Markovnikov selectivity, broad substrate scope (>70 examples), and good functional group tolerance. The reaction could be performed at gram scale and applied to the synthesis of drug molecules and heterocyclic compounds. When chiral substrates are used, the stereochemistry and enantiomeric excess are retained. Further application of the chemistry is seen in the
[EN] PRODRUGS OF NON- STEROID ANTI - INFLAMMATORY AGENTS (NSAIDS)<br/>[FR] PROMÉDICAMENTS D'AGENTS ANTI-INFLAMMATOIRES NON STÉROÏDIENS (AINS)
申请人:SELCH LARSEN CLAUS
公开号:WO2013064153A1
公开(公告)日:2013-05-10
The present invention relates to novel depot formulations (prodrugs) comprising an immobility promoting unit linked via an ester to an active pharmaceutical ingredient, i.a. common NSAIDs. The novel depot formulations are suitable for intra-articular injections and are soluble at slightly acidic pH to facilitate ease of injection, and sparingly soluble at physiological pH thereby precipitating at the site of administration. The precipitate will slowly dissolve and the active drug is released from dissolved depot formulation following esterase mediated cleavage of the ester link between the immobility promoting unit and the active pharmaceutical agent.