Abstract The reaction of o-phthalaldehyde with β-aminomonohydroxy compounds leads to ortho-substituled phenyloxazolines. β-Aminodiols or-triols give tetracyelic bisoxazoiidines when reacted with o-phthalaldchyde. These two type of ring systems are generated in one step under extremely mild conditions.
![[2-(4-ethyl-4,5-dihydro-1,3-oxazol-2-yl)phenyl]methanol结构式](https://image.chemsrc.com/caspic/253/63285-63-2.png)
![[2-(4-propan-2-yl-4,5-dihydro-1,3-oxazol-2-yl)phenyl]methanol结构式](https://image.chemsrc.com/caspic/215/63285-64-3.png)