[EN] PREPARATION OF 24 ALKYL ANALOGS OF CHOLECALCIFEROL AND NON-RACEMIC COMPOUNDS [FR] PREPARATION D'ANALOGUES ALKYL-24 DE CHOLECALCIFEROL ET DE COMPOSES NON RACEMIQUES
[EN] PREPARATION OF 24 ALKYL ANALOGS OF CHOLECALCIFEROL AND NON-RACEMIC COMPOUNDS [FR] PREPARATION D'ANALOGUES ALKYL-24 DE CHOLECALCIFEROL ET DE COMPOSES NON RACEMIQUES
Preparation of 24 alkyl analogs of cholecalciferol and non-racemic compounds
申请人:Kutner Andrzej
公开号:US20050119241A1
公开(公告)日:2005-06-02
Disclosed is a process for the preparation of 24-alkyl analogs of cholecalcyferol of Formula 1 having a (5E) or (5Z) configuration, wherein X represents a hydrogen atom, a hydroxy group or an OR
1
group, where R
1
, R
2
and R
3
may be the same or different and represent groups suitable for hydroxyl protection, and R
4
is a C
1-6
alkyl chain or a C
1-6
cykloalkyl group, optionally substituted with C
1-3
alkyl groups, especially for calcipotriol. The invention also provides new intermediates and non-racemic compounds being valuable synthones for the synthesis of pharmacologically active substances.
[EN] PREPARATION OF 24 ALKYL ANALOGS OF CHOLECALCIFEROL AND NON-RACEMIC COMPOUNDS<br/>[FR] PREPARATION D'ANALOGUES ALKYL-24 DE CHOLECALCIFEROL ET DE COMPOSES NON RACEMIQUES