The CoI2(PPh3)2/Zn system effectively catalyzes the [2 + 2 + 2] ene-diyne cycloaddition of 1,6-heptadiynes with allenes in a highly regio- and chemoselective fashion to yield substituted benzene derivatives in good to excellent yields.

A new strategy for Rh(I)-catalyzed [2+2+2] cycloadditions of 1,6-diynes with potassium (Z)-(2-bromovinyl)trifluoroborate as the third two-atom unit has been realized, which provides a facile entry to polysubstituented benzene derivatives.

Hexa-substituted benzene derivatives show larger two-photon cross sections than the corresponding dipolar counterparts and the largest values of delta(max) = 2000 GM and delta(max)/MW = 2.25 GM g(-1) have been obtained with a compound having C[triple bond]C and C=C bonds in the conjugation bridge.

We have successfully developed a new synthetic approach to modulate the electrostatic potentials of metallocavitands and thus their selective recognition towards substituted benzene derivatives via integrating two metal cations of different electronegativity into a self-assembled system.

Mycobacterium smegmatb contains two homologous series of dialkene mycolic acids with the same empirical formula (CnHzn-40s) , one series with n = 74, 76, 78, 80, and 82, and the other series with n = 75,77,79,81, and 83 (Wong, M. Y. H., Steck, P. A., and Gray, G. R. (1979) J. Biol. Chem 254,5734-5740). The separation of all 10 of these components has been achieved by reverse phase partition chr...

Central to understanding the process of V(D)J recombination is appreciation of the protein-DNA complex which assembles on the recombination signal sequences (RSS). In addition to RAG1 and RAG2, the protein HMG1 is known to stimulate the efficiency of the cleavage reaction. Using electrophoretic mobility shift analysis we show that HMG1 stimulates the in vitro assembly of a stable complex with t...

In this study, the excellent scalability of flow chemistry was shown. Selective formation of mono-bromoketones was chosen as a model reaction. In a full multivariate optimization experiment, 60 different settings for reaction parameters such as temperature and reaction time were screened, requiring only small amounts of chemicals. A mathematical model of the data was obtained and an optimum set...

Nano-Fe3O4 attached to Crosslinked sulfonated polyacrylamide (Cross-PAA-SO3H) as a superior catalyst has been utilized for the preparation of 3-alkyl-4-phenyl-1,3-thiazole-2(3H)-thione derivatives through a three-component reactions of phenacyl bromide or 4-methoxyphenacyl bromide, carbon disulfide and primary amine. The best results were gained in ethanol and we found that the reaction gave co...