19-NOR-VITAMIN D ANALOGS WITH 3,2-DIHYDROFURAN RING
申请人:DeLuca Hector F.
公开号:US20100009945A1
公开(公告)日:2010-01-14
19-nor-vitamin D analogs having an additional dihydrofuran ring connecting the 3β-oxygen and carbon-2 of the A-ring of the analog, and pharmaceutical uses therefore, are described. These compounds exhibit selective in vitro and in vivo activities, making them therapeutic agents for the treatment or prophylaxis of autoimmune diseases, some types of cancers, metabolic bone diseases, osteomalacia, osteopenia, secondary hyperparathyroidism, psoriasis, or other skin diseases.
New 1α,25-Dihydroxy-19-norvitamin D<sub>3</sub> Compounds Constrained in a Single A-Ring Conformation: Synthesis of the Analogues by Ring-Closing Metathesis Route and Their Biological Evaluation
作者:Agnieszka Glebocka、Katarzyna Sokolowska、Rafal R. Sicinski、Lori A. Plum、Hector F. DeLuca
DOI:10.1021/jm9001583
日期:2009.6.11
Vitamin D compounds possessing A rings prohibited from flipping to the alternative chair form (i.e., analogues 2 and 26) were synthesized. The bicyclic fragment 22 consisting of the fused cyclohexane and dihydropyran rings was constructed via the ring-closing metathesis route. Also, a homologous synthon 23 with an attached dihydropyran ring was successfully synthesized using this strategy. The carbonyl deprotection in 22 yielded cyclohexanone 5 that was subjected to Julia coupling with the anion of the phenylthiazoline sulfone 25. In the resulting isomeric 19-norvitamins 2 and 26, their A rings can exist only in the alpha- and beta-conformation. The analogue 26 was 300 times more active in binding to the vitamin D receptor protein, 30 times more effective in causing HL-60 differentiation, and 10 times more active in transcription. These results confirm that the beta-chair form of the vitamin D ring A is necessary for the binding to the receptor.
2-Ethyl and 2-Ethylidene Analogues of 1α,25-Dihydroxy-19-norvitamin D<sub>3</sub>: Synthesis, Conformational Analysis, Biological Activities, and Docking to the Modeled rVDR Ligand Binding Domain
作者:Rafal R. Sicinski、Piotr Rotkiewicz、Andrzej Kolinski、Wanda Sicinska、Jean M. Prahl、Connie M. Smith、Hector F. DeLuca
DOI:10.1021/jm020007m
日期:2002.8.1
Novel 19-nor analogues of 1alpha,25-dihydroxyvitamin D(3) were prepared and substituted at C-2 with an ethylidene group. The synthetic pathway was via Wittig-Horner coupling of the corresponding A-ring phosphine oxides with the protected 25-hydroxy Grundmann's ketones. Selective catalytic hydrogenation of 2-ethylidene analogues provided the 2alpha- and 2beta-ethyl compounds. The 2-ethylidene-19-nor
19-Nor-Vitamin D Analogs with 1,2-Dihydrofuran Ring
申请人:DeLuca Hector F.
公开号:US20100009944A1
公开(公告)日:2010-01-14
19-nor-vitamin D analogs having an additional dihydrofuran ring connecting the 1α-oxygen and carbon-2 of the A-ring of the analog, and pharmaceutical uses therefore, are described. These compounds exhibit selective in vitro and in vivo activities, making them therapeutic agents for the treatment or prophylaxis of autoimmune diseases, some types of cancers, secondary hyperparathyroidism, psoriasis, or other skin diseases.