Li, Hongjie published the artcileSimultaneous Construction of Planar and Central Chiralities as Well as Unprecedented Axial Chirality on and around a Ferrocene Backbone, Quality Control of 539-88-8, the main research area is chiral spirocyclic cyclopentadienyltetrahydropentalenyliron pyrrolidine preparation crystal structure; crystal structure chiral spirocyclic cyclopentadienyltetrahydropentalenyliron pyrrolidine derivative; mol structure chiral spirocyclic cyclopentadienyltetrahydropentalenyliron pyrrolidine.
Simultaneous generation of planar, central and axial chiralities on and around a ferrocene backbone via a D-phenylglycinol-induced intramol. iminium cyclization was disclosed, which is rare and differs from known methods. Chiral spiro[cyclopentadienyl-1,2,3,3a-tetrahydropentalenyliron(II)-1,2′-pyrrolidine] derivatives were prepared according to the new method, and their structures were characterized unambiguously. The axial chirality caused by the ferrocene backbone and the rigid spiral structure was verified by NOESY and variable-temperature NMR experiments and single-crystal XRD analyses. Mechanism for the stereoselective iminium cyclization reaction was suggested, which was influenced by steric hindrance and H bonding.
Journal of Organic Chemistry published new progress about Crystal structure. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Quality Control of 539-88-8.
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics