First synthesis of non-symmetrical “phthalimidoyl active ester” bi-dentate cross-linking reagents having an acid chloride, 2-benzothiazole, or 1-benzotriazol group
Syntheses and reactivities of non-symmetrical “active ester” bi-dentate cross-linking reagents having a phthalimidoyl and acid chloride, 2-benzothiazole, or 1-benzotriazole group
active ester” bi-dentate cross-linking reagents having an acid chloride, 2-benzothiazole, or 1-benzotriazole group (i.e., 9, 15, and 16) on the basis of the reactivity study of the “active ester” model compounds, 11–14, toward the various nucleophiles and examined their reaction selectivity towards the same nucleophiles. Then, we applied for the modification of cholesterol at the more reactive site of
Depending on the N-heterocyclic carbene catalyst utilized, alpha-unbranched aldehydes selectively provided amides, esters, or carboxylicacids through oxidation by NCS. The alpha-unbranched aldehyde underwent these reactions chemoselectively in the presence of an aromatic or alpha-branched aldehyde.
This paper reports the reaction of N-(phthalimidoyloxy)-3-phenylpropionate (2a) and -tosylate (6) with benzyl alcohol as a nucleophile to afford the products via Lossen-type rearrangement. To study the scope of this reaction mechanism, we also studied the reaction of several N-sulfonyloxyimide derivatives with benzyl alcohol under similar conditions and found that the same types of products were obtained
Photo-curable coating formulations which comprise a durable and/or red-shifted reactable hydroxyphenylbenzotriazole ultraviolet light absorber (UVA) are effectively photocured employing a combination of &agr;-hydroxy ketone and bisacylphosphine oxide photoinitiators. The reactable UVA's are reacted into the coating upon curing. The combination of the photoinitiators bis(2,4,6-trimethylbenzoyl)phenylphosphine oxide and 1-hydroxycyclohexylphenylketone is especially effective for this purpose.