摘要:
Novel antihypercholesterolemic agents are provided. An exemplary group of compounds has the structural formula (I) ##STR1## wherein R is a C-17 side chain, R.sup.1 is --OH, .dbd.O, or the like, and X and Y are CH, C--OH, C--OCH.sub.3 or C--Z. Methods of using the compound of formula (I) or other novel oxysterol analogs to treat hypercholesterolemia are provided, as are pharmaceutical compositions containing the compounds.
摘要:
Novel antihypercholesterolemic agents are provided. An exemplary group of compounds has the structural formula (I) ##STR1## wherein R is a C-17 side chain, R.sup.1 is --OH, .dbd.O, or the like, and X and Y are N, N.fwdarw.O, CH, C--OH, C--OCH.sub.3 or C--Z. Methods of using the compound of formula (I) or other novel oxysterol analogs to treat hypercholesterolemia are provided, as are pharmaceutical compositions containing the compounds.
摘要:
Polyoxoheterocyclic tetracycles related to the Chinese antimalarial natural product qinghaosu (artemisinin) are disclosed. These materials have a ##STR1## core structure with an oxygen (carbonyl or alkyl ether) at position 12 and in some cases one or two alkyl or aralkyl substituents at position 11. These materials have antimalarial properties.
摘要:
A process for synthesizing oxygen-containing polyoxatetracycle compounds and in particular analogs of the antimalarial agent known as qinghaosu or artemisinin is disclosed. The process employs as a reactant an olefinically unsaturated bicyclic bridging ketone having nonenolizable bridgehead moieties for both of its alpha positions. This ketone is converted to a vinylsilane that is subjected to ozonolytic cleavage of its olefinic bond to yield a member of a family of unique carboxyl/carbonyl-substituted vinylsilanes which may in turn optionally be subjected to a wide range of reactions prior to a final ozonolysis/acidification step which closes the oxygen-containing ring structure. The various intermediates are claimed as aspects of this invention as are novel tetracycles and their use as antimalarials.
摘要:
A process for synthesizing oxygen-containing polyoxatetracycle compounds and in particular analogs of the antimalarial agent known as qinghaosu or artemisinin is disclosed. The process employs as a reactant an olefinically unsaturated bicyclic bridging ketone having nonenolizable bridgehead moieties for both of its alpha positions. This ketone is converted to a vinylsilane that is subjected to ozonolytic cleavage of its olefinic bond to yield a member of a family of unique carboxyl/carbonyl-substituted vinylsilanes which may in turn optionally be subjected to a wide range of reactions prior to a final ozonolysis/acidification step which closes the oxygen-containing ring structure. The various intermediates are claimed as aspects of this invention as are novel tetracycles and their use as antimalarials.
摘要:
Introduction of a C-12 substituent and especially a .beta. C-12 substituent into glucocorticoids improves their usefulness as topical antiinflammatories by increasing their topical activity relative to their systemic activity, thus reducing systemic side effects such as adrenal suppression.
摘要:
The present invention relates to methods for use in producing epothilones and analogs and derivatives thereof. A general method according to the present invention broadly comprises performing an aldol condensation of a first compound with a second compound thereby to form a third compound selected from the formulas: and stereoisomers thereof, and performing a macrolactonization of the third compound. The present invention also provides chemical compounds, and methods for producing such chemical compounds, that are useful in producing epothilones and analogs and derivatives thereof.
摘要:
This invention provides new thiazolindinedione derivatives and new arylacetic acid derivatives. These compounds are useful for the treatment of certain cardiovascular certain diseases, certain endocrine diseases, certain inflammatory diseases, certain neoplastic (malignant) and non-malignant proliferative diseases, certain neuro-psychiatric disorders, certain viral diseases, and diseases associated with these viral infections as discussed herein.
摘要:
A process for synthesizing polyoxa tetracyclics which involves the ozonolysis of a single-ring-structure vinyl silane with resulting direct formation of the desired multiple ring matrial. The polyoxa tetracyclic compounds have the formula ##STR1## The vinyl silanes have the structure ##STR2## The vinyl silanes are new chemical compounds as are corresponding primary ozonide and dioxetane intermediates. In a preferred embodiment, this invention provides a total synthesis of the antimalarial artemisinin.
摘要:
A process for synthesizing polyoxa tetracyclics which involves the ozonolysis of a single-ring-structure vinyl silane with resulting direct formation of the desired multiple ring material. The polyoxa tetracyclic compounds have the formula ##STR1## The vinyl silanes have the structure ##STR2## The vinyl silanes are new chemical compounds as are corresponding primary ozonide and dioxetane intermediates. In a preferred embodiment, this invention provides a total synthesis of the antimalarial artemisinin.