A new stereoselective total synthesis of malyngic acid has been achieved from a known oxazolidinone derivative via eight steps involving the Evans asymmetric alkylation as the chirality-inducing step and chelation-controlled Zn(BH4)2 reduction of an α-hydroxy ketone intermediate for the installation of the 12,13-anti stereochemistry. Fulgidic acid, the C12-epimer of malyngic acid, has also been synthesized
Synthesis of fulgidic acid and the two possible stereoisomers of chaenomic acid D
作者:Narihito Ogawa、Keisuke Gonda、Yuichi Kobayashi
DOI:10.1039/d3ob01820b
日期:——
We synthesized fulgidic acid and the proposed structure for chaenomic acid D. The core part of the two natural products was constructed stereoselectively by the addition of acetic acid to the α,β-unsaturated epoxy alcohol in the presence of a palladium catalyst. Subsequently, the two natural products were synthesized from the intermediate in a few steps. The data for the synthesized fulgidic acid were
我们合成了黄精酸和毛甘酸 D 的结构。这两种天然产物的核心部分是通过在钯催化剂存在下将乙酸加成到 α,β-不饱和环氧醇中而立体选择性地构建的。随后,通过几个步骤从中间体合成了两种天然产物。合成的黄精酸的数据与报道的数据非常吻合。木瓜酸在1 H 和13 C NMR 数据中与天然产物非常一致,但在旋光度方面不一致。还合成了木瓜酸的 15 R异构体,但1 H 和13 C NMR 数据与天然产物不一致。
BENZENE POLYCARBOXYLIC ACID COMPOUNDS AND THEIR USE AS DRUG
申请人:RDInnovation ApS
公开号:EP2831151B1
公开(公告)日:2016-12-14
Benzene Polycarboxylic Acid Compounds and Their Use as Drug
申请人:RDInnovation ApS
公开号:US20160017104A1
公开(公告)日:2016-01-21
The present invention relates to new benzene polycarboxylic acids compound, which is prepared by alkaline oxidation of hydrolyzed lignin. The present invention also relates to the use of the new benzene polycarboxylic acids compound as part of a composite substance, where the composite substance is prepared by complexing or encapsulating the new benzene polycarboxylic acid compounds with a metal cation. The present invention also relates to a method for preparing the new benzene polycarboxylic acids compound and for its use in cosmetic, nutraceutical and pharmaceutical compositions.