Facile synthesis of mono-, bis- and tris-aryl-substituted aniline derivatives in aqueous DMF
作者:Chun Liu、Xiaoxiao Song、Qijian Ni、Jieshan Qiu
DOI:10.3998/ark.5550190.0013.906
日期:——
A facile, efficient and general protocol for synthesizing a series of mono-, bisand tris-arylsubstituted anilinederivatives is described via the Pd(OAc)2-catalyzed aerobic and ligand-free Suzuki reaction of mono-, diand tribromoanilines with aryl boronic acids in aqueous N,Ndimethylformamide (DMF). This is the first example to prepare 2,6-bisaryl-4-nitroanilines and 2,6-bisarylanilines via a palladium-catalyzed
Magnetic Interaction of Pyridyl-Substituted Thioaminyl Stable Free Radicals<sup>1</sup>
作者:Yozo Miura、Yuichi Oyama、Yoshio Teki
DOI:10.1021/jo0205659
日期:2003.2.1
as radical crystals. Their ESR spectra were measured, and the NS and pyridyl nitrogen and anilino meta and pyridyl ortho and para proton hyperfine coupling constants were determined. The spin-density calculations based on the density functional theory were performed by the UBecke 3LYP hybrid method using the STO 6-31G basis set. X-ray crystallographic analyses were performed for three radicals, and
Syntheses of Stable <i>N</i>-<i>tert</i>-Alkoxyarylaminyl Mono- and Diradicals by the Reaction of the Lithium Salts of 2,4,6-Trisubstituted Anilines with <i>tert</i>-Alkyl Mono- and Diperoxybenzoates<sup>1</sup>
作者:Yozo Miura、Toshiyuki Nishi
DOI:10.1021/jo0402881
日期:2005.5.1
The reaction of the lithiumsalts of 2,4,6-triaryl- and 2-tert-butyl-4,6-diarylanilines with tert-alkyl mono- and diperoxybenzoates gave isolable N-tert-alkoxyarylaminyl mono- and diradicals. The substituent effects of tert-alkyl peroxybenzoates on the yields of N-tert-alkylarylaminyls were studied.
Heterocycle-Substituted Stable Thioaminyl Radicals: Isolation, ESR Spectra, and Magnetic Properties<sup>1</sup>
作者:Yozo Miura、Tatsuya Tomimura、Yoshio Teki
DOI:10.1021/jo000901q
日期:2000.11.1
N-[(2-Benzothiazolyl)thio]- (1), N-[(2-benzoxazolyl)thio]- (2), and N-(2-pyrimidylthio)-2,4,6-trisubstituted-phenylaminyls (3) were generated by oxidation of the corresponding amines. Although 2 and 3 were not sufficiently persistent to be isolated, 1 was very persistent and could be isolated as radical crystals. The ESRspectra of nondeuterated and partially deuterated 1-3 radicals were measured,
First Isolation of Monomeric <i>N</i>-Alkoxyarylaminyl Radicals and Their Chemical and Magnetic Properties<sup>1</sup>
作者:Yozo Miura、Tatsuya Tomimura、Nobuaki Matsuba、Rika Tanaka、Masaaki Nakatsuji、Yoshio Teki
DOI:10.1021/jo0106288
日期:2001.11.1
The present report describes the first isolation of monomeric N-alkoxyarylaminyls and their chemical and magnetic properties. Reaction of the corresponding lithium amides of 2,4-diaryl-6-tert-butylanilines, 2,6-diaryl-4-tert-butylanilines, or 2,4,6-triarylanilines with tert-butyl peroxybenzoate in THF at -78 degrees C yielded quite persistent N-tert-butoxy-2,4-diaryl-6-tert-butylphenylaminyls (1),