LiClO4- or LiOTf-accelerated 1,3-dipolar cycloaddition reactions: a facile synthesis of cis-fused chromano[4,3-c]isoxazoles
摘要:
Acetonitrile solutions of lithium perchlorate or lithium triflate are found to accelerate considerably the intramolecular 1,3-dipolar cycloaddition reactions of nitrones derived in situ from hydroxylamines and the O-prenyl derivatives of salicylaldehydes to afford enhanced rates and improved yields of tetrahydrochromano[4,3-c]isoxazole derivatives with high diastereoselectivity. The stereochemistry of the products has been assigned by using extensive NMR studies. (C) 2003 Elsevier Science Ltd. All rights reserved.
The present invention provides compounds useful for increasing cellular ATP binding cassette transporter ABCA1 production in mammals, and to methods of using such compounds in the treatment of coronary artery diseases, dyslipidiemias and metabolic syndrome. The invention also relates to methods for the preparation of such compounds, and to pharmaceutical compositions containing them.
The present invention provides compounds useful for increasing cellular ATP binding cassette transporter ABCA1 production in mammals, and to methods of using such compounds in the treatment of coronary artery diseases, dyslipidiemias and metabolic syndrome. The invention also relates to methods for the preparation of such compounds, and to pharmaceutical compositions containing them.
[EN] The present invention provides compounds useful for increasing cellular ATP binding cassette transporter ABCAl production in mammals, and to methods of using such compounds in the treatment of coronary artery diseases, dyslipidiemias and metabolic syndrome. The invention also relates to methods for the preparation of such compounds, and to pharmaceutical compositions containing them. [FR] La présente invention concerne des composés utiles pour augmenter la production de transporteur de cassette de liaison à l'ATP cellulaire ABCA1 chez des mammifères, et des procédés d'utilisation de tels composés dans le traitement de maladies coronariennes, de dyslipidémies et du syndrome métabolique. L'invention concerne également des procédés de préparation de tels composés, et des compositions pharmaceutiques les contenant.