Process for the preparation of novel 2-alkoxy-3,4-dihydro-2H-pyrans

• Main Authors: MAXIMILIAN GRASSBERGER, HELLMUTH REINSHAGEN
• Format: Patent
• Language: English
• Published: 15.02.1979
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

The 2-alkoxy-3,4-dihydro-2H-pyrans of the formula I are prepared by reaction of correspondingly 2,3-substituted acrolein with an appropriate vinyl ether. R1 and R2 are identical or different and denote a phenyl group which is optionally substituted one or more times, or a heterocyclic radical, and R...