Patent
Derivatives of 2H-pyran-2-one
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TLDR
In this article, a (1α, 4α, 5α)-6,6-dimethyl-4-halo-substituted-methyl-3-oxabicyclo[3.1.0]hexan-2-one and its novel intermediates from known and inexpensive starting materials are described and exemplified.Abstract:
Processes for producing a (1α, 4α, 5α)-6,6-dimethyl-4-halo-substituted-methyl-3-oxabicyclo[3.1.0]hexan-2-one and its novel intermediates from known and inexpensive starting materials are described and exemplified.read more
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Substituted pyran-2-ones
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Process for preparing unsaturated six-membered lactones
TL;DR: In this paper, a process for the preparation of cyclic lactones by heating a six-membered hydroxy substituted lactone in the presence of a catalyst is described. But this process requires the substitution of the substitutions with alkyl substituents on the ring of the same carbon atom.
References
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Process for the preparation of cyclopropane derivatives and compounds produced therein
TL;DR: In this paper, the process for the preparation of cyclopropane carboxylic acid of the formula "STR1" was described, in which the CO 2 H substituent on the carbon 1 and CO 2 N substituents on carbon 2 are in the cis-position relative to one another, and Z represents the R 2 residue which has the same meaning as R 1 but is identical or different thereto.
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Enol lactone intermediate for the preparation of (1R,cis)-caronaldehydic acid
TL;DR: In this paper, (1R,cis)-caronaldehydic acid is prepared from (+)-Δ3 -carene by a multistep process in which the (+)- Δ3-carene derivative is cyclodehydrated, and the resulting novel intermediate enol lactone is treated with ozone, the resulting ozonide is subjected to reductive cleavage to afford the mixed anhydride of the open form of (1 R, cis)CARONDEHIC acid and this mixed anoxide is hydrolyzed to the desired product