Investigation on the oxidation of aryl oxiranylmethanols and the synthesis of 2-aryl-N-thiazolyl-oxirane-2-carboxamides as glucokinase activators
摘要:
RuCl3/NaIO4-initiated oxidation of oxiranemethanols was investigated, and two products, oxirane-2-carboxylic acid and (5'-oxotetrahydrofuran-3-yl)acetic acid, were obtained in variant ratios. The product structures were determined and a tentative mechanism involving oxidation-rearrangement-oxidation process was proposed. Glucokinase enzymatic assay revealed that oxiranecarboxamides 4a-c retained moderate GK activation potency with amide 4a showing an EC50 value of 584 nM and a high activation fold of 3.14. However, (5'-oxotetrahydrofuran-3-yl)acetamide ha is inactive. This study not only provided an alternative protocol to access (5'-oxotetrahydrofuran-3-yl)acetic acid analogs, but also yielded nanomolar GA activators (esp. 4a) for further structure-activity relationship study. (C) 2012 Elsevier Ltd. All rights reserved.
Investigation on the oxidation of aryl oxiranylmethanols and the synthesis of 2-aryl-N-thiazolyl-oxirane-2-carboxamides as glucokinase activators
摘要:
RuCl3/NaIO4-initiated oxidation of oxiranemethanols was investigated, and two products, oxirane-2-carboxylic acid and (5'-oxotetrahydrofuran-3-yl)acetic acid, were obtained in variant ratios. The product structures were determined and a tentative mechanism involving oxidation-rearrangement-oxidation process was proposed. Glucokinase enzymatic assay revealed that oxiranecarboxamides 4a-c retained moderate GK activation potency with amide 4a showing an EC50 value of 584 nM and a high activation fold of 3.14. However, (5'-oxotetrahydrofuran-3-yl)acetamide ha is inactive. This study not only provided an alternative protocol to access (5'-oxotetrahydrofuran-3-yl)acetic acid analogs, but also yielded nanomolar GA activators (esp. 4a) for further structure-activity relationship study. (C) 2012 Elsevier Ltd. All rights reserved.