Synthesis of a Sensitive and Selective Potassium-Sensing Fluoroionophore
作者:Richard D. Carpenter、A. S. Verkman
DOI:10.1021/ol902836c
日期:2010.3.19
An efficient synthesis Is reported that delivers in 5 steps and 52% overall yield a new structurally simplified fluorescent K+ sensor with Improved K+ sensitivity and selectivity over existing K+ sensors. The synthesis procedure utilizes a new template-directed oxidative C-N bond-forming macrocyclization reaction and reports new approaches to Pd(0), Sandmeyer-like and metal-free aminoarylations, as well as organotitanlum additions to vinylogous sulfonates.
Novel Rhodamine Dyes via Suzuki Coupling of Xanthone Triflates with Arylboroxins
作者:Michael Detty、Brandon Calitree
DOI:10.1055/s-0029-1218535
日期:2010.1
Novel rhodamine dyes were prepared from xanthone precursors in a ‘one-pot’ procedure via reaction of the xanthone with trifluoromethanesulfonic anhydride followed by Pd-mediated Suzuki coupling between the xanthone triflate and an arylboroxin. Rhodamines with 9-(3- or 4-carboxyphenyl) and 9-(3-nitrophenyl) substituents were prepared by this procedure. The procedure also works well with thio- and selenoxanthones, but not with telluroxanthones.