191732-72-6Relevant articles and documents
Compound for targeted degradation of BTK protein
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, (2021/06/22)
The invention provides a compound with the capability of degrading Bruton's tyrosine protein kinase (Btk) protein in a targeted manner, and particularly provides a compound as shown in the following formula I0, wherein the definition of each group is described in the specification. The compound provided by the invention can well degrade Btk protein in a targeted manner, so that the compound can be used for treating diseases related to Btk activity or expression quantity, such as tumors.
Influence of Linker Attachment Points on the Stability and Neosubstrate Degradation of Cereblon Ligands
Bricelj, Ale?a,Dora Ng, Yuen Lam,Ferber, Dominic,Gütschow, Michael,Kr?nke, Jan,Kuchta, Robert,Müller, Sina,Monschke, Marius,Sosi?, Izidor,Steinebach, Christian,Wagner, Karl G.
, p. 1733 - 1738 (2021/11/16)
Proteolysis targeting chimeras (PROTACs) hijacking the cereblon (CRBN) E3 ubiquitin ligase have emerged as a novel paradigm in drug development. Herein we found that linker attachment points of CRBN ligands highly affect their aqueous stability and neosubstrate degradation features. This work provides a blueprint for the assembly of future heterodimeric CRBN-based degraders with tailored properties.
Method for synthesizing lenalidomide
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, (2020/01/12)
The invention belongs to the field of chemical synthesis, and particularly relates to a method for synthesizing lenalidomide. The method adopts three-step polymerization, and specifically comprises: (1) carrying out a bromination reaction on 2-methyl-3-nitromethyl benzoate as a starting raw material and a bromination reagent to generate a compound 1 2-bromomethyl-3-nitromethyl benzoate; (2) performing cyclization on the compound 1 and 3-aminopiperidine-2,6-dione hydrochloride under a solvent-free condition to generate a compound 2 3-(4-nitro-1-oxo-1,3-dihydroisoindole-2-yl)piperidine-2,6-dione; and (3) reducing the compound 2 with a reducing agent to obtain lenalidomide. According to the invention, the method is a novel preparation process method of lenalidomide, and has advantages of easily available process raw materials, short steps, simple and convenient operation, environmental friendliness, implementation value of industrial production, and social and economic benefits.
Method for preparing lenalidomide
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Paragraph 0085-0090, (2020/06/09)
The invention provides a method for preparing lenalidomide. Specifically, the invention provides a method for preparing lenalidomide, which comprises a nitro-reduction step. The nitro-reduction step comprises the following steps: in a first solvent, under acidic conditions, in the presence of a reducing agent and a catalyst, a nitro-reduction reaction is carried out on a compound shown as a formula II to obtain a compound shown as a formula I; wherein the catalyst is palladium on carbon; the reducing agent is hypophosphorous acid or hypophosphite. The process is high in reaction yield, low inproduction cost and environment-friendly, and has great implementation value and social and economic benefits.
Anhydrous preparation method of lenalidomide
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Paragraph 0045-0063, (2020/07/24)
The invention relates to an anhydrous preparation method of lenalidomide. The invention discloses a novel method for preparing a 3-(4-amino-1-oxo-1,3-dihydro-2H-isoindole-2-yl) piperidine-2,6-diketoneanhydrous compound, and belongs to the technical field of chemical synthesis. The process route is short in steps, simple and convenient to operate and mild in reaction conditions, and the finally obtained product is excellent in quality and easy for industrial production.
Preparation method of lenalidomide B crystal form
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Paragraph 0119-0120, (2020/06/17)
The invention provides a preparation method of a lenalidomide B crystal form. Specifically the method comprises the following steps: (1) dissolving a raw material lenalidomide in alcohol to obtain a solution containing lenalidomide; and (2) adding water into the lenalidomide-containing solution obtained in the step (1), and crystallizing to obtain a lenalidomide B crystal form, wherein the alcoholis selected from 1,3-propylene glycol, 1,2-propylene glycol, and a combination of 1,3-propylene glycol and 1,2-propylene glycol. The method has high stability and high reliability.
Green production method of low-cost lenalidomide
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, (2019/03/25)
The invention relates to a green production method of low-cost lenalidomide. According to the method, in presence of a solvent and an alkali, 3-aminopiperidine-2,6-dione and 1-halo-acetoacetate are subjected to dehydrogenation halogen acid condensation, dealcoholizing amidation, 2-halo-4-nitrobutanal dehydration and dehydrochlorination or dehydrobromination, 3-(7-nitro-3-oxo-1H-isoindol-2-yl)piperidine-2,6-dione is obtained, the process is completed with a one-pot method, nitro is reduced into amino by catalytic hydrogenation of 3-(7-nitro-3-oxo-1H-isoindol-2-yl)piperidine-2,6-dione, and lenalidomide is prepared. The method has the advantages of cheap and easily available raw materials, short technological process, simple operation and environmental protection and is a production method beneficial to industrialization.
Preparation method of lenalidomide
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, (2019/11/20)
The invention provides a preparation method of lenalidomide. The preparation method of the lenalidomide comprises the steps of preparing an intermediate 2-halogen methyl-3 methyl nitrobenzoate and anintermediate 3-amino piperidine-2,6-diketone, and preparing the lenalidomide by using the two intermediates. The preparation method of the lenalidomide is simple in steps, high in yield, low in cost,and beneficial to industrial production.
Preparation method of substituted dioxopiperidine derivative
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Paragraph 0122-0128, (2019/04/30)
The invention discloses a preparation method of a substituted dioxopiperidine derivative. The preparation method comprises the following steps that a compound shown in the formula (II) and formamide react in the presence of C1-C4 alkanol alkali metal salt or alkaline earth metal salt, and a compound shown in the formula (I) is obtained; substituent groups in the compound shown in the formula (I) and the compound shown in the formula (II) are defined in the description. The product obtained through method is high in yield and purity, and the method is easy and convenient to operate. The formulas are shown in the description.
Preparation method of lenadomide
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, (2019/06/07)
The invention discloses a preparation method of lenalidomide, and belongs to the field of organic synthesis. 2-methyl-3-methyl nitrobenzoate and 3-N-benzyloxy-carbonyl-L-glutamine serve as starting materials, and an important intermediate 2-brooethyl-3-methyl nitrobenzoate is obtained through a bromination reaction of 2-methyl-3-methyl nitrobenzoate. 3-N-benzyloxy-carbonyl-L-glutamine is cyclizedunder catalysis to produce 3-N-benzyloxy-carbonyl-2,6-dioxopiperidine, an amino group is subjected to deprotection to produce 3-amino-2,6-piperidone halide, 3-(4-nitro-1-oxo-1,3-o-xylylenimine-2-yl)piperidine-2,6-diketone is obtained through an aminolysis reaction of 3-N-benzyloxy-carbonyl-2,6-dioxopiperidine and 2-brooethyl-3-methyl nitrobenzoate, and then lenalidomide is prepared through reduction. The method has the advantages that the cost of raw materials are low, aftertreatment is simple, and the yield is high, and the production cost of the lenalidomide as a bulk drug is greatly reduced. The method is a convenient and efficient lenalidomide synthesis method suitable for industrial production.