24079-79-6Relevant articles and documents
PROCESS FOR PREPARING CARBAMOYLOXYMETHYL TRIAZOLE CYCLOHEXYL ACID COMPOUNDS
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, (2020/10/27)
Improved methods and intermediates thereof for preparing carbamoyloxy methyl triazole cyclohexyl acid compounds are described. These compounds are useful as LPA antagonists. Formula (I).
Allylic oxidations catalyzed by dirhodium caprolactamate via aqueous tert-butyl hydroperoxide: The role of the tert-butylperoxy radical
McLaughlin, Emily C.,Choi, Hojae,Wang, Kan,Chiou, Grace,Doyle, Michael P.
supporting information; experimental part, p. 730 - 738 (2009/07/04)
Dirhodium(II) caprolactamate exhibits optimal efficiency for the production of the tert-butylperoxy radical, which is a selective reagent for hydrogen atom abstraction. These oxidation reactions occur with aqueous tert-butyl hydroperoxide (TBHP) without rapid hydrolysis of the caprolactamate ligands on dirhodium. Allylic oxidations of enones yield the corresponding enedione in moderate to high yields, and applications include allylic oxidations of steroidal enones. Although methylene oxidation to a ketone is more effective, methyl oxidation to a carboxylic acid can also be achieved. The superior efficiency of dirhodium(II) caprolactamate as a catalyst for allylic oxidations by TBHP (mol % of catalyst, % conversion) is described in comparative studies with other metal catalysts that are also reported to be effective for allylic oxidations. That different catalysts produce essentially the same mixture of products with the same relative yields suggests that the catalyst is not involved in product-forming steps. Mechanistic implications arising from studies of allylic oxidation with enones provide new insights into factors that control product formation. A previously undisclosed disproportionation pathway, catalyzed by the tert-butoxy radical, of mixed peroxides for the formation of ketone products via allylic oxidation has been uncovered.
SPECIFITY OF E. COLI SHIKIMATE DEHYDROGENASE TOWARDS ANALOGUES OF 3-DEHYDROSHIKIMIC ACID
Bugg, Timothy D. H.,Abell, Chris,Coggins, John R.
, p. 6779 - 6782 (2007/10/02)
Analogues of 3-dehydroshikimic acid which lack the C-4 and C-5 hydroxyl groups have been synthesised and assayed as substrates for shikimate dehydrogenase.The presence of the C-4 hydroxyl group is found to be very important for specificity, whereas the C-5 hydroxyl group is not.The enzyme exhibits enantioselectivity at C-1 and C-4 of the racemic substrate analogues.