Preparation, antimicrobial evaluation, and mutagenicity of [2-hydroxyaryl]-[1-methyl-5-nitro-1H-2-imidazolyl]methanols, [5-tert-Butyl-2-methylaminophenyl]-[1-methyl-5-nitro-1H-2-imidazolyl]methanol, and [2-Hydroxyaryl]-[1-methyl-5-nitro-1H-2-imidazolyl] ketones
摘要:
Efficient preparations of the titled compounds are described, their antimicrobial activity and mutagenic properties being evaluated. Some of the studied compounds are nonmutagenic and present a MIC as low as some of the usual standards in the field. (C) 1997 Elsevier Science Ltd.
Abstract C-Alkylations of phenol with 1-chloro and 1-bromoadamantane, 2-bromoadamantane, cyclohexyl bromide and exo-2-bromonorbornane, and C-alkylations of para-substituted phenol derivatives with 2-bromoadamantane are described.
REACTION OF<i>exo</i>-2-NORBORNYL AND 1-ADAMANTYL<i>p</i>-TOLUENESULFONATES WITH SODIUM PHENOXIDE IN TETRAHYDROFURAN. IONIZATION OF THE SUBSTRATES UNDER “APPARENTLY-S<sub>N</sub>2” CONDITIONS
exo-2-Norbornyl and 1-adamantyl tosylates react with sodiumphenoxide in tetrahydrofuran via ionization, most probably through a cyclic transition state. The results call for attention in interpreting substitution reactions under “apparently-SN2” conditions.
C(sp<sup>3</sup>)–C(sp<sup>2</sup>) cross-coupling of alkylsilicates with borylated aryl bromides – an iterative platform to alkylated aryl- and heteroaryl boronates
作者:Brandon A. Vara、Matthieu Jouffroy、Gary A. Molander
DOI:10.1039/c6sc03236b
日期:——
of silicates, the corresponding borylated compounds were isolated in good to excellent yields. Arylbromides bearing unprotected boronicacids are also generally tolerated for the first time and prove useful in multistep syntheses. Unlike many previously reported photoredox/Ni dual cross-couplings, the C(sp3)–C(sp2) bonds were forged using a transition metal-free photocatalyst, allowing a substantial