| 摘要 |
There are disclosed and claimed substituted cyclic lactones and process for preparation thereof. In particular, there are disclosed substituted cyclic lactones having alkyl substituents on the ring, especially such lactones having substituents on the ring of which two on the same carbon atom. Additionally, the invention herein disclosed and claimed relates to a process for the preparation of lactones by heating a six-membered hydroxy substituted lactone in the presence of a catalyst.
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