The best reaction conditions and the syntheses of some new bis(tri-n-butylstannylated) aromatic and heteroaromatic compounds by means of a Barbier-like sonochemical reaction are reported. Full 1 H-, 13 C-, and 119 Sn-NMR data of the new organotin compounds are informed.
The palladium-catalyzed cross coupling reactions between trineophylstannylvinyl esters and unsaturated acyl chlorides lead mostly to 4-oxo-2,5-dienes in good yields (60-77%). In some cases homocoupling products are also formed. On the other hand, the Stille reaction of Z-di-and trisubstituted vinyl iodides with trineophylvinylstannanes enables the synthesis of polysubstituted butadienes in moderate to good yields (40-60%).
Organo-boron compounds S 0040Three-Step Synthesis of Arylpolyboronic Acids from Phenols via Organotin Compounds. -Aryldi-and triboronic acids are prepared in three steps starting from readily available phenols under mild conditions. Subsequent Suzuki cross-coupling reactions afford polycyclic hydrocarbons in good yields. -(FIDELIBUS, P. M.; SILBESTRI, G. F.; LOCKHART, M. T.; MANDOLESI, S. D.; CHOPA*, A. B.; PODESTA, J. C.; Appl. Organomet. Chem. 21 (2007) 8, 682-687; Dep. Quim., Univ. Nac. Sur, 8000 Bahia Blanca, Argent.; Eng.) -Bartels 48-164
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.