Synthesis of axially chiral gold complexes and their applications in asymmetric catalyses

• Yin-wei Sun,
• Qin Xu and
• Min Shi

Beilstein J. Org. Chem. 2013, 9, 2224–2232, doi:10.3762/bjoc.9.261

• [55]. Then, (S)-7 was obtained by treatment of (S)-6 with Tf2O and pyridine in DCM in 99% yield. The usage of dimethylbis(diphenylphosphino)xanthene (XantPhos) as a ligand and Pd2(dba)3 as a catalyst in the presence of Cs2CO3, facilitated the reaction of (S)-7 with benzylamine in toluene to give the

Surfactant catalyzed convenient and greener synthesis of tetrahydrobenzo[a]xanthene-11-ones at ambient temperature

• Pravin V. Shinde,
• Amol H. Kategaonkar,
• Bapurao B. Shingate and
• Murlidhar S. Shingare

Beilstein J. Org. Chem. 2011, 7, 53–58, doi:10.3762/bjoc.7.9

• ]xanthen-11-one using tetradecyltrimethylammonium bromide (TTAB) at room temperature in water is described. Keywords: green chemistry; in-water synthesis; surfactant; tetradecyltrimethylammonium bromide (TTAB); xanthene; Introduction The development of novel synthetic methodologies to facilitate the

• biodynamic heterocycles and their synthesis has received much attention especially in the field of medicinal/pharmaceutical chemistry due to their wide range of biological/pharmacological activities, e.g., antibacterial [6], anti-inflammatory [7] and antiviral [8]. Some xanthene based compounds have found

• application as antagonists for inhibiting the action of zoxalamine and in photodynamic therapy [9][10]. In addition, their derivatives can be used as dyes [11][12], pH sensitive fluorescent materials for the visualization of biomolecular assemblies [13] and in laser technologies [14][15]. Among the xanthene