Abstract: When 7, 8-dihydro-2H-oxocin-3 (4H)-one (14) was heated with hydrochloric acid for several minutes, transannular rearrangement involving participation of ether oxygen was encountered and 5-(3-chloropropyl) dihydro-3 (2H)-furanone (13a) was isolated in good yield. Exposure of 14 to hydrobromic acid gave rise to the corresponding bromide (13b). Under similar conditions, 7, 8-dihydro-5-phenyl-2H-oxocin-3 (4H)-one (22) and 5-phenyl- ...
![9-Methyl-7-oxa-9-azabicyclo[3.3.1]nonan-3-one Structure](https://image.chemsrc.com/caspic/101/7224-81-9.png)
![9,9-dimethyl-3-phenyl-7-oxa-9-azoniabicyclo[3.3.1]non-3-ene Structure](https://image.chemsrc.com/caspic/424/20893-57-6.png)
