We demonstrate the use of a catecholic anchor (Dopa) for selective modification of the inner surface of an halloysite clay nanotube. Aqueous Dopa binds to alumina at the tube lumen and does not bind the silica surface under the same conditions. Selectivity of surface modification was evidenced using X-ray photoelectron spectroscopy (XPS) and (13)C solid state NMR spectroscopy. Surface-initiated atom transfer radical polymerization (SI-ATRP) was performed through selectively adsorbed Dopa to graft a layer of polymer brush into the nanotube lumen.

Preparation of Fe(Me 2 SiC 6 H 4 SiMe 2 )(1-methylpyrazole) 2 (CO) 2 (7a).In a 100 mL Schlenk tube, complex 1 (100 mg, 0.20 mmol) was dissolved in THF (5 mL), and 1-methylpyrazole (33 mg, 0.4 mmol) was added to this solution at room temperature. The color of the solution was immediately changed from colorless to red. After mixing this solution for 1 hr at room temperature, the solvent was evaporated in vacuo. This crude product was washed with hexane (10 mL), and dissolved in THF (5 mL). The solution was layered with pentane (20 mL) to give 7a as red crystals (88 mg, 0.19 mmol, 96 %). 1 H NMR (400

An efficient synthetic method for the preparation of multisubstituted furans, thiophenes, and pyrroles using ynolates was developed. This novel formal [4 + 1] annulation by C2-C3 and C3-C4 bond formations includes cycloaddition, cyclization, decarboxylation, and dehydration as key steps.

COT) 2 Fe and the open ferrocenes (MPDE) 2 Fe (MPDE = η 5 -3-methylpentadienyl) and (DMPDE) 2 Fe (DMPDE = η 5 -2,4-dimethylpentadienyl) were found to function as catalyst precursors for the hydrosilylation of alkenes in the presence of auxiliary ligands. Screening trials determined that the optimal catalyst system was composed of (COT) 2 Fe and adamantyl isocyanide, allowing the selective hydrosilylation of styrene derivatives with trisubstituted hydrosiloxanes and a polydimethylsiloxane bearing Me 2 SiH moieties as the end groups. Under the appropriate conditions, the dehydrogenative silylation side reaction was completely suppressed, and the reaction TON exceeded 5000.