In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Asymmetric hydrogenation of quinolines with high substrate/catalyst ratio, published in 2007-02-14, which mentions a compound: 221012-82-4, mainly applied to quinoline alkyl asym hydrogenation iridium spiro diphosphinite; tetrahydroquinoline asym synthesis, Related Products of 221012-82-4.
The chiral diphosphinite ligand derived from (R)-1,1′-spirobiindane-7,7′-diol has been found to be highly effective in the Ir-catalyzed asym. hydrogenation of quinolines with high substrate/catalyst ratio (up to 5000) and high enantioselectivity (up to 94% ee).
There are many compounds similar to this compound(221012-82-4)Related Products of 221012-82-4. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.
Reference:
Quinoxaline – Wikipedia,
Quinoxaline | C8H6N2 | ChemSpider