In the title compound, C(8)H(6)BrCl(3)O, there is a weak intra-molecular C-H⋯Cl hydrogen bond involving the O bound methylene group. Intermolecular Cl⋯Cl contacts [3.482 (2) Å] are present in the crystal structure.

Telematics applications play an essential role in the dissemination of environmental information and environmental measures. This contribution gives an overview of the applications of environment telematics in Europe as a result of two projects which were performed on an international level. The analysis covers the situation in EC countries as well as in CEE countries, with an emphasis on regio...

The mol-ecule of the title compound, C(5)H(9)NO(3), is essentially planar [the maximum deviation for a non-H atom from the mean plane is 0.021 (3) Å] due to the π-conjugation of the hydroxy-imino and carbonyl groups, which are trans to each other; ab initio calculations in vacuo at the DFT (B3LYP/6-311G**++) level of theory confirmed that E conformer is indeed the lowest in energy. The packing ...

Here we describe the synthesis and application of a novel 2,3-dicyclohexylsuccinimide (Cy2SI) protecting group towards regioselective purine glycosylation and alkylation reactions. This bulky protecting group promotes high regioselectivity during the glycosylation (as well as diastereoselectivity) or alkylation of purines using Hoffer's chlorosugar or tert-butyl bromoacetate, respectively. Cy2S...

work in the synthesis of podand molecules6), the present paper describes the preparation of certain podand-type trimers of cephalosporin antibiotics (Scheme 1 ). As the central block of the target trimers the tricarboxylic acid 3 was employed, which was obtained by the alkylation of phloroglucinol (1) with methyl bromoacetate and subsequent alkaline hydrolysis. The tert-butyl esters of 7-aminoc...

The triphenyl-methyl group in the title compound, C(28)H(23)IO(2)S, has the methine carbon slightly flattened out [ΣC(phen-yl)-C-C(phen-yl) = 332.8 (6) °]. The -C-O-C-C-S- chain connecting the triphenyl-methyl group and the aromatic ring adopts an extended zigzag conformation, these five atoms being approximately co-planar (r.m.s. deviation 0.260 Å).

The title compound, C(6)H(11)N(3)O(2)S, consists of a roughly planar mol-ecule (r.m.s deviation from planarity = 0.077 Å for the non-H atoms) and has the S atom in an anti position to the imine N atom. This N atom is the acceptor of a strongly bent inter-nal N-H⋯N hydrogen bond donated by the amino group. In the crystal, mol-ecules are arranged in undulating layers parallel to (010). The mol-ec...