127180-76-1Relevant articles and documents
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Tanaka,K. et al.
, p. 3619 - 3625 (1979)
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Synthesis and evaluation of colletoic acid core derivatives
Ling, Taotao,Gautam, Lekh Nath,Griffith, Elizabeth,Das, Sourav,Lang, Walter,Shadrick, William R.,Shelat, Anang,Lee, Richard,Rivas, Fatima
supporting information, p. 126 - 132 (2016/02/05)
Cortisol homeostasis has been linked to the pathogenesis of metabolic syndrome (MetS), since it stimulates hepatic gluconeogenesis and adipogenesis. MetS is classified as a constellation of health conditions that increase the risk of type 2 diabetes and cardiovascular disease. Intracellular cortisol levels are regulated by 11β-hydroxysteroid dehydrogenase (type 1 and type 2) in a tissue dependent manner. The type 1 enzyme (11β-HSD1) is widely expressed in glucocorticoid targeted tissues and is responsible for the conversion of cortisone to the active cortisol. Local reduction of cortisol regeneration presents a potential strategy for MetS treatment. Recently we disclosed the total synthesis of (+)-colletoic acid as a potent 11β-HSD1 inhibitor. Herein, we describe our improved processing chemistry for the synthesis of the colletoic acid core to access a diverse number of derivatives for evaluation against 11β-HSD1. The Evan's chiral auxiliary was utilized to construct the acyclic precursor 12 to afford the acorane core 9 using a modified Heck reaction in excellent chemical yields. The colletoic acid core derivatives showed modest activity against 11β-HSD1 and will serve for further biological evaluation.
Highly regioselective Wittig reactions of cyclic ketones with a stabilized phosphorus ylide under controlled microwave heating
Wu, Jinlong,Wu, Huafeng,Wei, Shaoyong,Dai, Wei-Min
, p. 4401 - 4404 (2007/10/03)
Significant base and temperature effects on the Wittig reactions of cyclohexanones with (carbethoxymethylene)triphenylphosphorane under microwave irradiation were observed. For the Wittig reactions carried out in a domestic microwave oven under solvent-free conditions, the initially formed exo-olefin products isomerized into the thermodynamically more stable endo-olefins due to uncontrolled high reaction temperature. In sharp contrast, under controlled microwave heating, both exo- and endo-olefins have been selectively synthesized by accurately regulating the reaction temperature with or without a base.