2953-37-9Relevant articles and documents
Thiazolium ylide-catalyzed intramolecular aldehyde-ketone benzoin-forming reactions: Substrate scope
Hachisu, Yoshifumi,Bode, Jeffrey W.,Suzuki, Keisuke
, p. 1097 - 1100 (2004)
The scope and limitations of intramolecular benzoin-forming reactions of aldehydes and ketones catalyzed by the combination of a thiazolium salt and a base are described. After optimization of the reaction conditions, five- and six-membered cyclic acyloins were obtained in good to excellent yields and competing reactions such as intramolecular aldol reactions were suppressed. The analogous closure of seven-membered rings proved difficult.
Structure-activity relationships of oxysterol-derived pharmacological chaperones for Niemann-Pick type C1 protein
Ohgane, Kenji,Karaki, Fumika,Noguchi-Yachide, Tomomi,Dodo, Kosuke,Hashimoto, Yuichi
supporting information, p. 3480 - 3485 (2014/07/22)
Niemann-Pick disease type C is a fatal neurodegenerative disease, and its major cause is mutations in NPC1 gene. This gene encodes NPC1 protein, a late endosomal polytopic membrane protein required for intracellular cholesterol trafficking. One prevalent mutation (I1061T) has been shown to cause a folding defect, which results in failure of endosomal localization of the protein, leading to loss-of-function phenotype. We have previously demonstrated that several oxysterols and their derivatives act as pharmacological chaperones; binding of these compounds to NPC1I1061T mutant protein corrects the localization/maturation defect of the mutant protein. Here, we disclose detailed structure-activity relationships of oxysterol derivatives as pharmacological chaperones for NPC1I1061T mutant.
Sterols as anticancer agents: Synthesis of ring-B oxygenated steroids, cytotoxic profile, and comprehensive SAR analysis
Carvalho, Jo?o F. S.,Silva, M. Manuel Cruz,Moreira, Jo?o N.,Sim?es, Sérgio,Sá E Melo, M. Luisa
supporting information; experimental part, p. 7632 - 7638 (2011/02/21)
The cytotoxicity of oxysterols was systematically studied in tumor and normal cells. Synthetic strategies to prepare this library included oxidations at ring B and a new method to yield 6β-hemiphthalates directly from Δ5-steroids. Most oxysterols were cytotoxic and showed selectivity toward cancer cells, LAMA-84 cells (leukemia) being particularly sensitive to 4, 8, 22, and 27 (IC50 5.6 μM). The structural requirements to induce selective toxicity are discussed to shed light on the development of new anticancer drugs.
