In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Facile access to chiral 4-substituted chromanes through Rh-catalyzed asymmetric hydrogenation, published in 2020-07-31, which mentions a compound: 36620-11-8, Name is Bis(norbornadiene)rhodium (I) tetrafluoroborate, Molecular C14H8BF4Rh, Electric Literature of C14H8BF4Rh.
Rh/ZhaoPhos-catalyzed asym. hydrogenation of a series of (E)-2-(chroman-4-ylidene)acetates I (R = H, Cl, F, MeO; R1 = CO2Me, CO2Et, CO2iPr) was successfully developed to prepare various chiral 4-substituted chromanes II with high yields and excellent enantioselectivities (up to 99% yield, 98% ee). Moreover, the gram-scale hydrogenation could be performed well in the presence of 0.02 mol% catalyst loading (TON = 5000) and the hydrogenation product II (R = H, R1 = CO2Et) was easily converted to access other important compounds, II (R = H, R1 = CO2H, CH2OH) which demonstrated the synthetic utility of this asym. catalytic methodol.
After consulting a lot of data, we found that this compound(36620-11-8)Electric Literature of C14H8BF4Rh can be used in many types of reactions. And in most cases, this compound has more advantages.
Reference:
Quinuclidine – Wikipedia,
Quinuclidine | C7H13N | ChemSpider