Über die Stereoselektivität der 9,9′‐Spirobifluoren‐kronenäther gegenüber α‐Aminoalkoholen

Stereoselectivity of 9,9′‐Spirobifluorene Crown Ethers towards α‐Amino Alcohols Crown ethers I‐VI were tested by partition experiments for their stereoselectivity towards α‐amino alcohols 1–10. The stereoselectivity depends in a regular way on both the absolute and relative configuration of the crown ether and α‐aminoalcohol. Comments are made on some high stereoselectivities.