| 摘要 |
A process for the preparation of haloacetals of the formula: <IMAGE> where X is chlorine or bromine and R' and R'' are the same and represent C1 to 5 aliphatic groups or R' and R'' together represent a 1,2-ethylene group, optionally substituted with 1 to 4 C1 to 3 alkyl groups, forming a dioxolane ring, is disclosed, in which vinylacetate and bromine or chlorine are added in simultaneous increments to C1 to 5 aliphatic alcohol while maintaining a constant slight excess of the halogen to form a haloacetaldehyde dialkylacetal which optionally is further reacted with an optionally substituted ethylene glycol in the presence of a strong acid to form a 2-halomethyldioxolane. |
