Efficient Microwave-Assisted Pd-Catalyzed Hydroxylation of Aryl Chlorides in the Presence of Carbonate
摘要:
An efficient microwave-assisted, palladium-catalyzed hydroxylation of aryl chlorides in the presence of a weak base carbonate was developed, which rapidly converts aryl and heteroaryl chlorides to phenols, and can be used when the aryl chloride is functionalized with a ketone, aldehyde, ester, nitrile, or amide.
Iron-Catalyzed Direct Alkenylation of 2-Substituted Azaarenes with <i>N</i>-Sulfonyl Aldimines via C–H Bond Activation
作者:Bo Qian、Pan Xie、Yinjun Xie、Hanmin Huang
DOI:10.1021/ol200684b
日期:2011.5.20
A novel iron-catalyzed alkenylation of 2-substituted azaarenes through sp3 C–Hbondactivation has been developed. A favorable E2-elimination is proposed as a key step to cleavage of C–H and C–N bonds for the construction of a C═C bond in high stereoselectivity. This transformation represents an efficient way to synthesize 2-alkenylated azaarenes from simple starting materials.
The Use of Sodium Chlorate/Hydrochloric Acid Mixtures as a Novel and Selective Chlorination Agent
作者:Byung-Seok Moon、Han-Young Choi、Hun-Yeong Koh、Dae-Yoon Chi
DOI:10.5012/bkcs.2011.32.2.472
日期:2011.2.20
Sodium chlorate/hydrochloric acid mixtures were used to chlorinate activated arenes and the $\alpha$-position of ketones. This chlorination method was used to produce selectively mono-, di-, and trichlorinated compounds by controlling the molarity of sodium chlorate. This reagent proved to be much more efficient and easier to handle than chlorine gas.
Synthesis of diazadibenzo-18-crown-6 ligands with appended chromophoric and fluorophoric groups as potential metal ion chemosensors
作者:Guo-Ping Xue、Paul B. Savage、Krzysztof E. Krakowiak、Reed M. Izatt、Jerald S. Bradshaw
DOI:10.1002/jhet.5570380631
日期:2001.11
Six new diazadibenzo-18-crown-6 ligands substituted with two each of 8-hydroxyquinoline (7), 8-amino-quinoline (attached through its C-2 or C-7 position) (12 and 13), 8-methoxyquinoline (18), 5-chloro-8-methoxyquinoline (19), and dansylamidoethyl (21) sidearms were synthesized as potential metal ion chemosensors and potential reagents for the selective extraction of certain metal ions from aqueous