跳转至内容
Merck
CN
  • Efficient generation and increased reactivity in cationic gold via Brønsted acid or Lewis acid assisted activation of an imidogold precatalyst.

Efficient generation and increased reactivity in cationic gold via Brønsted acid or Lewis acid assisted activation of an imidogold precatalyst.

Organic letters (2014-06-24)
Junbin Han, Naoto Shimizu, Zhichao Lu, Hideki Amii, Gerald B Hammond, Bo Xu
摘要

Brønsted or Lewis acid assisted activation of an imidogold precatalyst (L-Au-Pht, Pht = phthalimide) offers a superior way to generate cationic gold compared with the commonly used silver-based system. It is also broadly applicable for most common gold-catalyzed reactions. For reactions that require milder conditions, milder acids can be used for optimized efficiency.

材料
产品编号
品牌
产品描述

Sigma-Aldrich
银, conductive paste
Sigma-Aldrich
银, powder, 2-3.5 μm, ≥99.9% trace metals basis
Sigma-Aldrich
银, nanopowder, <100 nm particle size, contains PVP as dispersant, 99.5% trace metals basis
Sigma-Aldrich
银, nanopowder, <150 nm particle size, 99% trace metals basis
Sigma-Aldrich
银, flakes, 10 μm, ≥99.9% trace metals basis
Sigma-Aldrich
银, wire, diam. 0.5 mm, 99.9% trace metals basis
Sigma-Aldrich
银, wire, diam. 0.5 mm, ≥99.99% trace metals basis
Sigma-Aldrich
金, powder, <45 μm, 99.99% trace metals basis
Sigma-Aldrich
银纳米线悬浮液, diam. × L 200  nm × 10 μm, 0.5% (isopropyl alcohol suspension)
Sigma-Aldrich
银, wire, diam. 1.0 mm, 99.9% trace metals basis
Sigma-Aldrich
银, powder, 5-8 μm, ≥99.9% trace metals basis
Sigma-Aldrich
银, foil, thickness 0.1 mm, 99.9% trace metals basis
Sigma-Aldrich
银, shot, 1-3 mm, ≥99.99% trace metals basis
Sigma-Aldrich
银, foil, thickness 0.25 mm, 99.9% trace metals basis
Sigma-Aldrich
银, wire, diam. 0.25 mm, ≥99.99% trace metals basis
Sigma-Aldrich
银, granular, >250 μm, 99.99% trace metals basis
Sigma-Aldrich
银, powder, <45 μm, ≥99.99% trace metals basis
Sigma-Aldrich
银, colloidal, 65-75% Ag basis
Sigma-Aldrich
银, powder, <250 μm, 99.99% trace metals basis
Sigma-Aldrich
镀金显微镜载片, layer thickness 1000 Å, 99.999% (Au)
银, foil, 150x150mm, thickness 0.25mm, as rolled, 99.95+%
金, rod, 50mm, diameter 3.0mm, as drawn, 99.95%
Sigma-Aldrich
银, wire, diam. 0.25 mm, 99.9% trace metals basis
Sigma-Aldrich
银, foil, thickness 0.025 mm, 99.9% trace metals basis
银, foil, 2m coil, thickness 0.025mm, annealed, 99.95+%
Sigma-Aldrich
银, wire, diam. 2.0 mm, ≥99.99% trace metals basis
Sigma-Aldrich
金, wire, diam. 0.25 mm, 99.99% trace metals basis
Sigma-Aldrich
银, wire, diam. 1.0 mm, ≥99.99% trace metals basis
Sigma-Aldrich
银, wire, diam. 0.1 mm, 99.9% trace metals basis
Sigma-Aldrich
银, evaporation slug, diam. × L 0.6 cm × 1.2 cm, 99.99% trace metals basis