The biomarker compositions of iron sulfide nodules (ISNs; upper Pliocene Valle Ricca section near Rome, Italy) that contain the ferrimagnetic mineral greigite (Fe3S4) were examined. In addition to the presence of specific terrestrial and marine biomarkers, consistent with formation in coastal marine sediments, these ISNs contain compounds thought to originate from sulfate reducing bacteria (SRB...

Here we provide definitive EPR evidence for the existence of α-triphenylstannylvinyl radicals such as (Z)-2 in low temperature O-directed free radical hydrostannation dialkyl propargylic alcohols with Ph3SnH/cat. Et3B and O2 PhMe.

The development of new chiral ligands plays a crucial role in expanding the utility of transition metal catalyzed asymmetric reactions.[1] A major research goal in asymmetric catalysis is to impart high enantioselectivity and activity to important reactions by the invention of new chiral ligands and the optimization of reaction conditions for use of these ligands. Many effective chiral bisphosp...

The reaction  between  trialkyl  phosphites  with  dialkyl  actylenedicarboxylates  in the presence of 2-hydroxyquinoline  (2-quinolinol)  leads  to  β-aminophsphonates derivatives  which  they  have  many applications in medicinal chemistry. When the reaction was performed by triphenylphosphite, a new pyrano quinoline  compounds  were obtained  in  fairly  good  yields. These  compounds also  ...