Recent advances in the synthesis of stannanes and the scope of their posterior chemical transformations

Pd-catalyzed coupling reactions of anhydro-aldose tosylhydrazones with aryl bromides to produce substituted exo -glycals

“…In most of the above methods base stable protecting groups had to be applied and/or the reagents like boronic acids [23] or stannanes [24] needed be prepared from aryl halides. In the present work we have investigated the formation aryl substituted exo-glycals E in the first Pdcatalyzed cross coupling reactions of ester or ether protected anhydro-aldose tosylhydrazones H with easily available aryl bromides.…”

Synthesis of Polysubstituted Germoles and Benzogermoles Using a Substoichiometric Amount of Diisobutylaluminum Hydride

“…The synthetic methods for organogermanium compounds have been less studied than those of other group 14 homologues, such as organosilicon and organotin compounds, although the organo­germanium compounds are potentially useful synthetic reagents and organic molecular materials . One of the promising germanium-based organic molecular materials is a germole, germacyclo­pentadiene.…”

Substituted triphenylamines as building blocks for star shaped organic electronic materials

“…13 C NMR (50 MHz, CD 2 Cl 2 ): d = 148.1 (s), 146.9 (s), 145.3 (s), 132.4 (d), 126.8 (d), 124.8 (d), 124.5 (d), 114.0 (s), 34.8 (s), 31.8 (q) ppm. MS (EI): m/z 435 (M + , 73%), 422 (96), 420 (100), 204 (35), 176 (47).…”

“…Stille cross-coupling reactions are commonly applied in literature, 47 however they require toxic stannyl intermediates. In order to avoid these undesirable precursors, highly stable pinacol boronic acid esters are used in Suzuki cross-coupling reactions ensuring high conversion, selectivity, and tolerance of functional groups representing a more convenient synthetic approach.…”