[EN] PROCESS FOR THE PREPARATION OF HERBICIDAL COMPOUNDS<br/>[FR] PROCÉDÉ DE PRÉPARATION DE COMPOSÉS HERBICIDES
申请人:SYNGENTA PARTICIPATIONS AG
公开号:WO2017186621A1
公开(公告)日:2017-11-02
The present invention relates to a process for the preparation of a compound of formula (IX) wherein R1, R2A, R2B, R3, R4, R5 and R6 are as defined in the specification. Furthermore, the present invention also relates to reduction of the compound of formula (IX) to produce a compound of formula (I).
an attempt to molecularly design liverXreceptor (LXR) β-selective agonists, we discovered that the combination of the 2-oxochromene moiety (head) and the imidazoline-2,4-dione moiety (tail) plays an important role in the expression potency and selectivity toward LXRβ. We synthesized a series of 2-oxochromene derivatives and identified 43 as a LXRβ-selective agonist that increased the HDL-C level without
在分子设计肝X受体(LXR)β-选择性激动剂的尝试中,我们发现2-氧代色烯部分(头部)和咪唑啉-2,4-二酮部分(尾巴)的组合在表达能力和对LXRβ的选择性。我们合成了一系列2-oxochromene衍生物,并确定了43种LXRβ选择性激动剂,可在不显着升高TG水平的情况下增加HDL-C水平,并导致高脂饮食中主动脉弓内脂质蓄积面积减少。和胆固醇喂养的Bio F 1 B仓鼠。在这份手稿中,我们报告了这些2-氧代苯并二氢吡喃衍生物的设计,合成和药理作用。
The determination of the structure of the intermediate in the Bucherer-Bergs reaction (the transformation in aqueous solution of an aldehyde into the corresponding amino-acid via the hydantoin) showed that this reaction involved the formation of α-aminonitrile carbamate. The slow formation of the carbonic anhydride from the carbonate buffer limited the formation of that main intermediate which was
Synthesis of glycolurils and hydantoins by reaction of urea and 1,
<scp>2‐dicarbonyl</scp>
compounds using etidronic acid as a “green catalyst”
作者:Abdigali A. Bakibaev、Artur Uhov、Victor Malkov、Svetlana Panshina
DOI:10.1002/jhet.4132
日期:2020.12
known methods for the synthesis of heterocyclic compounds have disadvantages, such as a long reaction time and aggressive conditions. We have developed a new, rather simple and efficient method for the synthesis of a number of glycoluryls and hydantoins in water using a etidronic acid (HEDP) as “Green catalyst.” So, for the first time, the condensation reaction of ureas with 1, 2‐dicarbonyl compounds
The catalytic asymmetric aldol reaction of N-unprotected cyclic carboxyimides has been achieved. Silicon tetrachloride acts in situ as a protecting and mediating reagent and is converted to a nucleophilic species for the aldol reaction. The use of a chiral phosphine oxide catalyst can achieve enantioselective aldol reactions (up to 91/9 dr and 97/3 er) of various N-unprotected cyclic carboxyimides
已经实现了N-未保护的环状羧酰亚胺的催化不对称羟醛反应。四氯化硅在原位充当保护和中介试剂,并转化为用于醛醇反应的亲核物质。使用手性氧化膦催化剂可以实现各种N-未保护的环状羧酰亚胺(包括琥珀酰亚胺、乙内酰脲和格列酮)的对映选择性羟醛反应(高达 91/9 dr 和 97/3 er)。