Direct one-pot synthesis of luotonin F and analogues via rational logical design.

An efficient one-pot synthetic protocol has been proposed for the synthesis of luntonin F from easily available starting materials. Through a rational logical design, multifundamental reactions (iodination, Kornblum oxidation, and annulation) were assembled in one-pot. The developed approach can efficiently synthesize luntonin F and a diversity of analogues.

Methyl N-(4-nitro-phen-yl)carbamate.

In the title mol-ecule, C(8)H(8)N(2)O(4), the nitro and meth-oxy-carbonyl groups are twisted from the plane of aromatic ring by 5.1 (1) and 6.2 (1)°, respectively.

Novel fluorescent molecular clips: selective recognition towards Fe3+ in aqueous solution.

In this paper, we report the synthesis, characterization and Fe(3+)-sensing properties of a series of new artificial fluorescent molecular clips, and structure of clip 1 is confirmed by X-ray crystallography. All these molecular clips had the ability to bind and sense Fe(3+) selectively through decrease fluorescence responses in THF-MeOH-Water. Fluorimetric titration experiment indicated that the quenching of these compounds' fluorescence upon Fe(3+) probably arises from the electron/energy transfer between Fe(3+) and the excited chemosensors.

2-(Dimethyl-amino)-anthraquinone.

The mol-ecule of the title compound, C(16)H(13)NO(2), is almost planar, with a maximum deviation of 0.013 (2) Å from the best plane; the dihedral angle between the two aromatic rings is 1.06 (1)°.