Efficient ortho-formylation in vitamin E series, application to the semi-synthesis of natural 5- and 7-formyl-δ-tocotrienols revealing an unprecedented 5-bromo-7-formyl exchange
Semi-synthesis of 5- and 7-formyltocopherols and tocotrienols has been developed by ortho-formylation of C-5 or C-7-unsubstituted vitaminE derivatives (14 examples) up to 90% yield, through heating in the presence of respectively 10-10-15 equivalents of MgCl2-Et3N-(CH2O)n. Formylation of 5-bromo-δ-tocotrienol revealed an unprecedented 5-bromo/7-formyl exchange and yielded 7-bromo-5-formyl-δ-tocotrienol
[EN] TOCOTRIENOL DERIVATIVES, PHARMACEUTICAL COMPOSITION AND METHOD OF USE IN 5-LIPOXYGENASE RELATED DISEASES<br/>[FR] DÉRIVÉS DE TOCOTRIÉNOL, COMPOSITION PHARMACEUTIQUE ET LEUR MÉTHODE D'UTILISATION DANS LES MALADIES LIÉES À LA 5-LIPOXYGÉNASE
申请人:UNIVERSITÉ D'ANGERS
公开号:WO2017032881A1
公开(公告)日:2017-03-02
The present invention relates to compounds of formula (III) or to compounds of formula (IV) wherein R1, R2, R3 and R4 are as defined in the claims, and their use in therapeutic treatments of 5-lipoxygenase related diseases such as chronic airway inflammatory or dermatological disorders.
Recent studies have highlighted the biological potential of tocotrienols, a vitamin E subfamily. The major natural sources of tocotrienols are complex mixtures requiring particularly challenging purification processes. The present study describes efficient semi-synthetic strategies toward relevant.5-(R)-tocotrienol derivatives, using as a starting material 6-(R)-garcinoic acid, the major vitamin E derivative isolated from Garcinia kola nuts, a renewable vegetal source.
TOCOTRIENOL DERIVATIVES, PHARMACEUTICAL COMPOSITION AND METHOD OF USE IN 5-LIPOXYGENASE RELATED DISEASES
申请人:UNIVERSITÉ D'ANGERS
公开号:US20190144413A1
公开(公告)日:2019-05-16
The present invention relates to compounds of formula (III)
or to compounds of formula (IV)
wherein R
1
, R
2
, R
3
and R
4
are as defined in the claims, and their use in therapeutic treatments of 5-lipoxygenase related diseases such as chronic airway inflammatory or dermatological disorders.
Synthesis and Liver Microsomal Metabolic Stability Studies of a Fluorine‐Substituted δ‐Tocotrienol Derivative
A fluoro-substituted δ-tocotrienol derivative, DT3-F2, was synthesized. This compound was designed to stabilize the metabolically labile terminal methylgroups of δ-tocotrienol by replacing one C-H bond on each of the two methylgroups with a C-F bond. However, in vitro metabolic stability studies using mouse liver microsomes revealed an unexpected rapid enzymatic C-F bond hydrolysis of DT3-F2. To