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Synthesis and crystal structure of dichloro{bis[N-(4-methyl-2-pyridinyl)acetamide]} copper (II)

“…It shows that a retro-Claisen cleavage occurs during the reaction and then aminolysis between the intermediate and aminopyridine affords the product. 6 In the IR spectrum of 2, the band of ν N-H is at 3421 cm -1 compared with 3242 cm -1 of 1. This suggests that the N-H group of the amide is involved in hydrogen bonding in its solid state structure.…”

Silyl Glyoxylates. Conception and Realization of Flexible Conjunctive Reagents for Multicomponent Coupling

“…Since the targeted structure was a β-keto ester, the addition of 91 to 92 formally represented a Claisen condensation. The creation of fully substituted Claisen adducts (where deprotonation of the β-keto ester product is not feasible) is unusual, as are examples of stereoselective Claisen condensations. , We selected β-lactones as the acyl donor with the expectation that strain release would preclude the retro-Claisen pathway. An open question at the outset was the degree to which the stereogenic center in the β-lactone would impact the emerging fully substituted stereocenter.…”

Covalent attachment of chromophores to chlorinated copolymers for optical waveguides: Synthesis and optical characterization

“…An attempt to get any product by uncatalyzed reaction of DR19 with GMA was unsuccessful, even at 80 C and with reaction times of 48 h. The reaction was then tested with various catalysts, such as BFEt [42], TiBuO [43], ETPP [44], DMAP [45].…”