Reviewing the Polyolefin Cyclization Reaction of the C<sub>35</sub>Polyprene Catalyzed by Squalene-Hopene Cyclase
作者:Tsutomu Hoshino、Yuko Kumai、Tsutomu Sato
DOI:10.1002/chem.200802142
日期:2009.2.16
A review of the polycyclization reaction of the C35 polyprenoid by squalene‐hopene cyclase: Surprisingly, our results completely disagree with a previous publication in which it was reported that a hexacyclic skeleton was constructed as the single product. In our work many tri‐ and tetracyclic scaffolds were isolated, but no penta‐ or hexacycles. The reasons for the different results and the mechanism
A process of forming a d-tocotrienols from a (2S) 2-hydroxymethyl-6-hydroxy-alkylchroman compound, through reaction with a farnesyl Grignard or sulfone compound. Various methods of making the (2S) 2-hydroxymethyl-6-hydroxy-alklychroman compound are disclosed.
[EN] A PROCESS FOR THE STEREOSPECIFIC SYNTHESIS OF VITAMIN K2 AND ITS INTERMEDIATES<br/>[FR] PROCÉDÉ DE SYNTHÈSE STÉRÉOSPÉCIFIQUE DE LA VITAMINE K2 ET DE SES INTERMÉDIAIRES
申请人:[en]SYNERGIA LIFE SCIENCES PVT. LTD.
公开号:WO2023031841A1
公开(公告)日:2023-03-09
The present disclosure relates to a novel process for the synthesis of stereospecific compounds of Vitamin K2 group in general and Vitamin K2-7, in particular. It also discloses novel intermediates useful in the synthesis of stereospecific Vitamin K2-7. Compounds of the Vitamin K2 group obtained are crystalline and exhibit well defined melting points.
METHOD AND INTERMEDIATE COMPOUNDS FOR THE PREPARATION OF MENAQUINONE MK-7
申请人:Vitasynth Sp. z.o.o.,
公开号:US20230250041A1
公开(公告)日:2023-08-10
The invention relates to a method and intermediate compounds for the preparation of menaquinone MK-7. The method for the preparation of menaquinone MK-7 is characterized in that, it comprises coupling of a compound of formula (11) with a compound of formula (17) in the presence of a base, to obtain a compound of formula (18), which is subjected to desulfonylation reaction in the presence of a palladium catalyst, to obtain a compound of formula (19), which is subjected to oxidation reaction, to obtain menaquinone MK-7. The invention also relates to compound (8), preferably in a crystalline form, which is a convenient intermediate compound for the preparation of menaquinone MK-7.