63416-76-2Relevant academic research and scientific papers
A Lewis Base Catalysis Approach for the Photoredox Activation of Boronic Acids and Esters
Lima, Fabio,Sharma, Upendra K.,Grunenberg, Lars,Saha, Debasmita,Johannsen, Sandra,Sedelmeier, Joerg,Van der Eycken, Erik V.,Ley, Steven V.
supporting information, p. 15136 - 15140 (2017/11/20)
We report herein the use of a dual catalytic system comprising a Lewis base catalyst such as quinuclidin-3-ol or 4-dimethylaminopyridine and a photoredox catalyst to generate carbon radicals from either boronic acids or esters. This system enabled a wide range of alkyl boronic esters and aryl or alkyl boronic acids to react with electron-deficient olefins via radical addition to efficiently form C?C coupled products in a redox-neutral fashion. The Lewis base catalyst was shown to form a redox-active complex with either the boronic esters or the trimeric form of the boronic acids (boroxines) in solution.
Heck reaction of aryl bromides with pent-4-en-2-ol, 2-phenylpent-4-en-2-ol, or hept-6-en-3-ol catalysed by a palladium-tetraphosphine complex
Berthiol, Florian,Doucet, Henri,Santelli, Maurice
, p. 3589 - 3602 (2007/10/03)
The tetraphosphine cis,cis,cis-1,2,3,4-tetrakis(diphenylphosphinomethyl) cyclopentane in combination with [Pd(η3-C3H 5)Cl]2 affords a very efficient catalyst for the Heck reaction of aryl bromides with pent-4-en
4-Hydroxy-1,3-benzenedimethanol derivatives
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, (2008/06/13)
Compounds of the general formula (I): STR1 in which one or more substituents R1 may be present and in which: R1 represents a halogen atom, preferably fluorine or chlorine, or a trifluoromethyl group or a group --NR5 R6 in which R5 and R6 which may be the same or different represent a hydrogen atom, or an alkyl group containing from 1 to 6 carbon atoms, preferably 1 to 4 carbon atoms or an acyl group, preferably the residue of a C1 -C6 alkanoic acid; X represents a straight or branched chain alkyl group containing 2 to 6 carbon atoms; and R2 and R3 which may be the same or different each represent a hydrogen atom or an alkyl group containing from 1 to 4 carbon atoms, preferably a methyl group; and R4 represents a hydrogen atom or an alkyl group containing 1 to 4 carbon atoms, are provided together with processes for the production thereof. They have a β2 -stimulant activity.
