摘要:
This invention provides a novel class of vitamin D related compounds, namely, the 2-alkylidene-19-nor-vitamin D derivatives, as well as a general method for their chemical synthesis. The compounds have the formula: where Y1 and Y2, which may be the same or different, are each selected from the group consisting of hydrogen and a hydroxy-protecting group, R6 and R8, which may be the same or different, are each selected from hydrogen, alkyl, hydroxyalkyl and fluoroalkyl, or when taken together represent the group —(CH2)x— where x is an integer from 2 to 5, and where the group R represents any of the typical side chains known for vitamin D type compounds. These 2-substituted compounds are characterized by relatively high intestinal calcium transport activity and relatively high bone calcium mobilization activity resulting in novel therapeutic agents for the treatment of diseases where bone formation is desired, particularly low bone turnover osteoporosis. These compounds also exhibit pronounced activity in arresting the proliferation of undifferentiated cells and inducing their differentiation to the monocyte thus evidencing use as anti-cancer agents and for the treatment of diseases such as psoriasis.
摘要:
The invention relates to vitamin D analogs of general formula (I) wherein: R1 is a hydrogen atom or a substituent selected from the group consisting of hydroxy, CH2OH, CH2CH2OH, CH2CH2CH2OH, OCH3, OCH2OH, OCH2CH2OH and OCH2CH2CH2OH; R2 is a hydrogen atom or a substituent selected from the group consisting of OCH3, OCH2OH, CHm(CH2OH)n(CH2CH2OH)p, (CH2)qOH and O(CH2)rOH; wherein: m is 0 or 1, p, q and n are 0-3, r is 1-3 and m+n+p=3; with the proviso that R1 and/or R2 contain at least one OH group; R3 is a straight or branched, saturated or unsaturated aliphatic hydrocarbon of 6-13 C atoms which may be substituted with one or more substituents from the group hydroxy or fluoro. The invention further relates to methods of preparing these compounds, a pharmaceutical composition containing these compounds and to their use in pharmacotherapy and cosmetics.
摘要:
Kit comprising biotin, fluorescent and chemiluminescent labeled vitamin D compounds are disclosed. The disclosed kit may be used in assays for the presence of vitamin D, its metabolites and vitamin D analogs in biological fluids.
摘要:
An object of the present invention is to provide intermediates for the synthesis of 1&agr;-hydroxyvitamin D derivatives useful as drugs and processes for the preparation thereof. Namely, the present invention is a process for the preparation of a compound represented by the formula (2), which comprises reacting a compound represented by the formula (1) with a compound represented by the formula (4) in the presence of a palladium catalyst, a process for the preparation of a compound represented by the formula (3), which comprises further catalytically reducing the resulting compound represented by the formula (2) in the presence of a Lindlar catalyst and hydrogen gas and heating the obtained product and a process for the preparation of a compound represented by the formula (5), which comprises further oxidizing the resulting compound represented by the formula (3) with an oxidizing agent and the compounds represented by the formulae (1) to (3):
摘要:
A method of purifying 1&agr;,24(S)-dihydroxyvitamin D2 to obtain 1&agr;,24(S)-dihydroxyvitamin D2 in crystalline form. The method includes the steps of boiling a solvent under inert atmosphere, dissolving a product containing 1&agr;,24(S)-dihydroxyvitamin D2 to be purified in the solvent, cooling the solvent and dissolved product below ambient temperature for a sufficient amount of time to form a precipitate of 1&agr;,24(S)-dihydroxyvitamin D2 crystals, and recovering the 1&agr;,24(S)-dihydroxyvitamin D2 crystals. The purification technique involves using one of several binary solvent systems, namely, acetone and hexane, 2-propanol and hexane, or ethyl formate and petroleum ether.
摘要:
A compound of the formula wherein R is hydrogen or hydroxy, each R2 is independently H or halogen, X is ═CH2, or when R is hydroxy, X is hydrogen or ═CH2, and A is —C≡C—, or —CH2—CH2—, provided that when A is —CH2—CH2—, R2 is H.
摘要:
The present invention provides crystals of the compound represented by formula (I): crystals of a vitamin D derivative which are obtained by purifying a crude or preliminarily purified product of the vitamin D derivative through a reverse phase chromatography and then crystallizing the purified derivative from an organic solvent; novel compounds which are formed during the synthesis of a vitamin D derivative as by-product; and a method for purifying a vitamin D derivative or the precursor thereof. The method of the present invention makes it possible to supply a highly purified vitamin D derivative, especially ED-71, in bulk and steadily.
摘要:
The present invention relates to a process for preparing tocol acylate or tocopherol acylate having the following steps: a) combining tocol or tocopherol with an acylating agent to form a reaction mixture; b) irradiating the reaction mixture with microwave energy to from tocol acylate or tocopherol acylate; and c) isolating the tocol acylate or tocopherol acylate from the reaction mixture.
摘要:
The present invention provides a method for preparing a novel class of vitamin D compounds in which the C-25 or equivalent position has a double bond. In addition, the side chain is optionally extended by one or two methylene or methyne groups. The compounds prepared by the method of the present invention are of value as prodrugs for active 1&agr;, 24-dihydroxylated vitamin D compounds.
摘要:
Novel sulfur-containing analogs of 1&agr;,25-dihydroxy vitamin D3 are provided. These analogs are synthesized in a convergent manner by joining A-ring and C,D ring fragments. Each analog with 1&agr;,3&bgr;-substituent stereochemistry shows a pharmacologically desirable combination of high antiproliferative and high transcriptional activities in vitro and also low calcemic activity in vivo.