- A New Method for the Preparation of γ,δ-Unsaturated Ketones via Claisen Rearrangement
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Thermal rearrangement of monosodium salts of 3-(allyloxy)crotonates derived from primary and secondary allylic alcohols and of disodium salts of 3-(allyloxy)-2-alkenoic acids affords γ,δ-unsaturated ketones.
- Buechi, George,Vogel, Dennis E.
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- PYRROLIDINONE GLUCOKINASE ACTIVATORS
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Provided herein are compounds of the formula (I): as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of metabolic diseases and disorders such as, for example, type II diabetes mellitus.
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Page/Page column 35
(2009/10/30)
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- Synthesis of functionalized 2-alkoxybenzoates, 2-aryloxybenzoates and xanthones based on formal [3+3] cyclocondensations of 3-alkoxy- and 3-aryloxy-1-silyloxy-1,3-butadienes with 3-silyloxy-2-en-1-ones
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Functionalized 2-alkoxy- and 2-aryloxybenzoates were prepared by formal [3+3] cyclocondensations of 3-alkoxy- and 3-aryloxy-1-silyloxy-1,3-butadienes with 3-silyloxy-2-en-1-ones. The reaction of 2-aryloxybenzoates with concentrated sulfuric acid resulted in the formation of xanthones.
- Mro?, Gerson,Reinke, Helmut,Fischer, Christine,Langer, Peter
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p. 3910 - 3917
(2009/09/08)
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