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Others, however, insist that such a usage is an abuse of terminology, and limit the Michael addition to the formation of carbon–carbon bonds through the addition of carbon nucleophiles. The terms oxa-Michael reaction and aza-Michael reaction [2] have been used to refer to the 1,4-addition of oxygen and nitrogen nucleophiles, respectively. The ...
To manufacture a polyaspartic ester, an amine is reacted with dialkyl maleate by the aza-Michael reaction. [8]Diethyl maleate is the usual maleate used. This converts the primary amines to secondary amines and also introduces bulky groups to the molecule which causes steric hindrance, slowing the reaction down.
The nitro-Mannich reaction (or aza-Henry reaction) is the nucleophilic addition of a nitroalkane ... acts as a proficient catalyst for Michael addition reactions. [28]
An addition reaction is the reverse of an elimination reaction, in which one molecule divides into two or more molecules. For instance, the hydration of an alkene to an alcohol is reversed by dehydration. There are two main types of polar addition reactions: electrophilic addition and nucleophilic addition.
Generalised Tandem Michael-aldol reaction. Robinson annulation is one notable example of a wider class of chemical transformations termed Tandem Michael-aldol reactions, that sequentially combine Michael addition and aldol reaction into a single reaction. As is the case with Robinson annulation, Michael addition usually happens first to tether ...
He added people who've had allergic or otherwise adverse reactions to beta blockers shouldn't take the medication. But if they are necessary, he said doctors will typically prescribe smaller doses ...
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Jan 17, 2025; Miami, FL, USA; Skylar Diggins-Smith (4) of the Lunar Owls drives toward the basket as Breanna Stewart (30) of the Mist defends during the first half of the Unrivaled women’s ...