Results 111 to 120 of about 4,540 (259)

Using metrics and sustainability considerations to evaluate the use of bio-based and non-renewable Brønsted acidic ionic liquids to catalyse Fischer esterification reactions [PDF]

open access: yes, 2013
Background Ionic liquids have found uses in many applications, one of which is the joint solvation and catalysis of chemical transformations. Suitable Brønsted acidic ionic liquids can be formed by combining lactams with sulphonic acids. This work weighs
AC Cole   +51 more
core   +1 more source

Biginelli multicomponent reactions

open access: yes, 2015
Biginelli reaction is one of the most remarkable examples of MCRs discovered in 1893 and proof of its importance is the high number of articles reported in the last decade covering this field. This strategy allows the synthesis of important building blocks and versatile synthons such as 3,4-dihydropyrimidin-2-(1H)-one derivatives (DHPMs), which are ...
Marqués-López, Eugenia   +1 more
openaire   +1 more source

An unexpected Ireland–Claisen rearrangement cascade during the synthesis of the tricyclic core of Curcusone C: Mechanistic elucidation by trial-and-error and automatic artificial force-induced reaction (AFIR) computations [PDF]

open access: yes, 2019
In the course of a total synthesis effort directed toward the natural product curcusone C, the Stoltz group discovered an unexpected thermal rearrangement of a divinylcyclopropane to the product of a formal Cope/1,3-sigmatropic shift sequence.
Houk, K. N.   +6 more
core   +5 more sources

Trifluoroacetic Acid as an Effective Catalyst for Biginelli Reaction: One-Pot, Three-Component Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones (and-Thiones)

open access: yesE-Journal of Chemistry, 2011
Trifluoroacetic acid (TFA) is introduced as an effective catalyst for promotion of Biginelli reaction. 3,4-Dihydropyrimidin-2(1H)-one (-thione) derivatives (DHPMs) were simply and efficiently prepared using TFA catalyzed one-pot, three-component ...
Mohammad R. Mohammadizadeh, Neda Firoozi
doaj   +1 more source

Ethyl (E)-4-(2,4-Dimethoxyphenyl)-6-(2,4-dimethoxystyryl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate

open access: yesMolbank, 2017
A new compound belonging to the “heterostilbene” derivative, namely ethyl (E)-4-(2,4-dimethoxyphenyl)-6-(2,4-dimethoxystyryl)-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate (2), has been successfully synthesized as an unprecedented side product of the ...
Hery Suwito   +6 more
doaj   +1 more source

Advances in Biginelli reaction: A comprehensive review [PDF]

open access: bronze, 2023
Aravind Chandravarkar   +2 more
openalex   +1 more source

Application of Deep Eutectic Solvents in Promiscuous Lipase-Catalysed Aldol Reactions [PDF]

open access: yes, 2016
Financial support to this work was provided by the Spanish Ministerio de Economía y Competitividad (MEC) (CTQ2013-44153-P) and the Gobierno del Principado de Asturias (FC-15- GRUPIN14-002).
González Martínez, Daniel   +2 more
core   +3 more sources

Development of chiral phosphoric acids based on ferrocene-bridged paracyclophane frameworks [PDF]

open access: yes, 2013
International audienceThis work deals with the development of a new family of planar chiral phosphoric acids, based on a ferrocenophane/paracyclophane scaffold.
Betzer, Jean-François   +7 more
core   +6 more sources

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