Schuster, Ingeborg I. published the artcileEnhancement of the resonance interaction of out-of-plane methoxy groups by ortho-substituents in crowded anisoles, COA of Formula: C10H14O, the publication is Journal of Organic Chemistry (1988), 53(25), 5819-25, database is CAplus.
The 17O and 13C NMR chem. shifts of substituted anisoles provide evidence that the resonance interaction of methoxy groups which are perpendicular to the aromatic ring in crowded anisoles is influenced, to varying degrees, by ortho substituents. Enhancement of methoxy-to-aryl electron delocalization, brought about by these groups, follows the order isopropyl < ethyl < methyl << methoxy (in-plane) < tert-Bu. By an anal. of the mol. structures of several 3,5-dialkylanisic acids, related to 2,6-dialkylanisoles, this order becomes explicable in terms of repulsions between the lone pair electrons of the methoxy oxygen and bonding electrons of the proximate substituents. Methoxy groups that lie in the mol. plane are not similarly affected by neighboring substituents.
Journal of Organic Chemistry published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C24H12, COA of Formula: C10H14O.
Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem