نتایج جستجو برای: furans
تعداد نتایج: 955 فیلتر نتایج به سال:
An efficient palladium/copper-catalyzed approach to the synthesis of highly substituted 3-formyl furans from the reactions of readily available α-bromoenaminones with terminal alkynes has been developed. This methodology was realized by the cascade reactions of Sonogashira coupling and the subsequent intramolecular cyclization.
The direct aldol reaction of γ-crotonolactone and various aromatic aldehydes is catalyzed by bifunctional aminothiourea and aminosquaramide organocatalysts to provide diastereomerically and enantiomerically enriched 5-substituted 2(5H) furanones (γ-butenolides). The reaction is a simple alternative to the classical vinylogous aldol reaction of silyloxy furans.
Anaerobic digestion is a promising technology as renewable source of energy products, but these products have low economic value and process control challenging. Identifying intermediates formed throughout the could enhance understanding offer opportunities for improved monitoring, control, valorisation. In this review, present in anaerobic are identified discussed, including following: volatil...
A practical dearomative [4 + 3] cycloaddition of furans with vinylcarbenes to access oxa-bridged seven-membered carbocycles, complete and predictable stereoselectivity, is achieved by merging silver catalysis vinyl- N -triftosylhydrazones.
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