Method for the photochemical conversion of tachysterol compounds into previtamin dy compounds of compounds of trans-vitamin D compounds of cis-vitamin D.

摘要

THESE CONVERSIONS ARE MADE UNDER THE INFLUENCE OF RADIATION FROM EXPOSURE OF COMPOUND tachysterol AND THE TRANS-VITAMIN RESPECTIVELY dissolved in an appropriate solvent in the presence of photosensitizer POLYMERIC consisting of a polymer chain (EJE. CENTRAL) comprising a LINK SYNTHETIC covalently suitable for conversion photochemistry, to illuminate a wavelength of approx. 300 A 1.000NM, AND FOR ISOLATION OF COMPOUND previtamin DY CIS-VITAMIN D RESPECTIVELY FOR WHICH A photosensitizer is used in the polymer chain, which has been selected from the group consisting of a POLIETER CHAIN, CHAIN ​​OF polymer containing AMINO AND CHAIN ​​BLOCKS copolymer comprising polyether segments AND / OR SEGMENTS OF pOLYMER CONTAINING GROUPS amines, so the photosensitizer pOLYMERIC dissolved in the solvent system during RADIATION eXPOSURE BUT EITHER PRECIPITAEN COLD FROM THE sOLUTION AND CAN BE SEPARATED OR IF SUCH CHAIN ​​AMINES polymer comprises GROUPS MAY BE protonated with a substance ACID ELIMINATED IN PROPER AND aftertreatment. The invention also relates A photosensitizer TO BE USED IN SUCH METHOD.