83937-66-0Relevant academic research and scientific papers
Influence of Solvent Polarity on the Radiationless Decay of the Intramolecular Exciplexes of ω-Phenyl-α-N,N-dimethylaminoalkanes
Auweraer, M. Van der,Viaene, L.,Haver, Ph. Van,Schryver, F. C. De
, p. 7178 - 7184 (2007/10/02)
Using optoacoustic spectroscopy, the radiationless decay processes of intramolecular exciplexes of ω-phenyl-α-N,N-dimethylaminoalkanes are investigated.Upon increase of the solvent polarity, the relative efficiency of the intersystem crossing process from the singlet exciplex to the locally excited triplet decreases compared to the efficiency of the internal conversion process.These results can be rationalized in the framework of the current electron-transfer theory and compared to the results obtained for other ω-aryl-α-N,N-dimethylaminoalkanes.
Rearrangement of (Substituted benzyl)trimethylammonium Ylides in a Nonbasic Medium: The Improved Sommelet-Hauser Rearrangement
Nakano, Mitsuji,Sato, Yoshiro
, p. 1844 - 1847 (2007/10/02)
Benzyl quaternary ammonium ylide formation in a nonbasic medium was accomplished by fluoride anion induced desilylation of benzyldimethylammonium bromide (3a) and ortho- or para-substituted benzyl analogues 3b-k.Treatment of 3 with CsF in HMPA at room temperature gives high yields of the Sommelet-Hauser rearrangement products 7 from 3a and methyl-, acetoxy-, and chloro-substituted analogues 3b-f.However, formation of the Stevens rearrangement products 8 is competitive for the reaction of compounds 3g-k having strong electron-withdrawing substituents such as acetyl, cyano, and nitrogen groups.From the o-cyano-substituted analogue 3h, a considerable amount of para Sommelet-Hauser rearrangement product is isolated.
A Convenient Synthesis of o-Methylbenzylamine Derivatives from Benzyl Halides: The Improved Sommelet-Hauser Rearrangement
Nakano, Mitsuji,Sato, Yoshiro
, p. 1684 - 1685 (2007/10/02)
Desilylation by fluoride anion of benzyldimethyl(trimethylsislylmethyl)ammonium halides having a Cl(1-), CN(1-), or AcO(1-) substituent on the benzene ring gave high yields of the Sommelet-Hauser rearrangement products at room temperature.
