[EN] IMPROVED, COST EFFECTIVE PROCESS FOR SYNTHESIS OF VITAMIN D3 AND ITS ANALOGUE CALCIFEDIOL FROM ERGOSTEROL [FR] PROCÉDÉ ÉCONOMIQUE, AMÉLIORÉ, DE SYNTHÈSE DE VITAMINE D3 ET SON ANALOGUE CALCIFÉDIOL À PARTIR D'ERGOSTÉROL
by AmB. Furthermore, the C24 methyl group and Δ22 doublebond in the sidechain of Erg are equally important for the interaction with AmB. Conformational analysis revealed that the C24 methyl group contributes to the interaction by increasing the van der Waals (VDW) contact area of the sidechain, while the Δ22 doublebond restricts the sidechain conformation to maximize the VDW contact with the rigid
An efficient, two-stage, continuous-flow synthesis of 1α,25-(OH)2-vitamin D3 (activated vitamin D3) and its analogues was achieved. The developed method afforded the desired products in satisfactory yields using a high-intensity and economical light source, i.e., a high-pressure mercury lamp. In addition, our method required neither intermediate purification nor high-dilution conditions.
[EN] IMPROVED, COST EFFECTIVE PROCESS FOR SYNTHESIS OF VITAMIN D3 AND ITS ANALOGUE CALCIFEDIOL FROM ERGOSTEROL<br/>[FR] PROCÉDÉ ÉCONOMIQUE, AMÉLIORÉ, DE SYNTHÈSE DE VITAMINE D3 ET SON ANALOGUE CALCIFÉDIOL À PARTIR D'ERGOSTÉROL
申请人:FERMENTA BIOTECH LTD
公开号:WO2021005619A1
公开(公告)日:2021-01-14
Disclosed herein is an improved and efficient process for synthesis of vitamin D3 and its analogue Calcifediol from Ergosterol. Particularly, the present invention discloses the synthesis of key intermediate 3β-tert-Butyldimethylsilyloxy-22-hydroxy-23,24-bisnorchola-5,7-diene (5), and novel intermediate β-tert-Butyldimethylsilyloxy-22-iodo-23,24-bisnorchola-5,7-diene (9) by a simple and cost effective process. The industrially viable processes for preparation of said intermediate(s) results in providing provitamins with various side chains and the desired products in high yield.