Towards applications in catalysis: investigation on photocatalytic activities of a derivative family of the Keplerate type molybdenum–oxide based polyoxometalates
作者:Yunshan Zhou、Libo Qin、Chao Yu、Tian Xiong、Lijuan Zhang、Waqar Ahmad、Hao Han
DOI:10.1039/c4ra07700h
日期:——
The photocatalytic potential of a derivative family of the unique Keplerate type nanoporous Mo–O based polyoxometalates has been evaluated.
Disclosed are an 8-arm polyethylene glycol (PEG) derivative (formula 1), manufacturing method and modified bio-related substance thereby, wherein a tetravalent group U and four trivalent groups Ec form a highly symmetric octavalent central structure CORE0 together, Lc connects the octavalent center to eight PEG arms having polydiversity or monodiversity and having n1-n8 as the degrees of polymerization thereof. The terminal of one PEG chain is connected to at least one functional group F (k ≥ 1), and said PEG chain and F can be directly connected (g = 0) or connected with a divalent linking group L0 connected with a terminal branched group G (g = 1) therebetween. The latter provides more reacting sites to combine more pharmaceutical molecules, thereby increasing the drug loading capacity. The near-center symmetric structure of the derivative allows more precise control over the molecular weight during large-scale production, thereby facilitating acquisition of a product having a narrower molecular weight distribution. A bio-related substance modified thereby has a more uniform and controllable performance.
The present invention provides a compound having excellent histone acetyltransferase inhibitory activity against EP300 and/or CREBBP, or a pharmacologically acceptable salt thereof. The compound is represented by the following formula (1) or a pharmacologically acceptable salt thereof:
wherein ring Q1, ring Q2, R1, R2, R3 and R4 respectively have the same meanings as defined in the specification.
Eight-arm polyethylene glycol derivative, production method therefor, and modified bio-related substance thereof
申请人:XIAMEN SINOPEG BIOTECH CO., LTD.
公开号:US10434182B2
公开(公告)日:2019-10-08
Disclosed are an eight-arm polyethylene glycol (PEG) derivative (formula I), production method therefor and modified bio-related substance thereby. Wherein, one tetravalent group U together with four trivalent groups Ec form a highly symmetrical octavalent group CORE0; Lc connects the octavalent group to eight PEG chains having polydispersity or monodispersity and having n1 to n8 as the degree of polymerization thereof; the terminal of one PEG chain is connected to at least one functional group F (k≥1); said PEG chain and F therebetween can be directly connected (g=0) or be indirectly connected via a linking group L0 to a terminal end-branching group G (g=1); the latter provides more reactive sites for binding more drug molecules and increases the drug loading. The eight-arm polyethylene glycol derivative has a centrosymmetric or approximately centrosymmetric structure, and leads to more precise control of the molecular weight in large-scale production and much narrower distribution of molecular weight for products. The modified bio-related substance thereby has a more uniform and controllable performance.
本发明公开了一种八臂聚乙二醇(PEG)衍生物(式 I)、其生产方法及其改性生物相关物质。其中,一个四价基团 U 与四个三价基团 Ec 形成一个高度对称的八价基团 CORE0;Lc 将八价基团连接到八条具有多分散性或单分散性且聚合度为 n1 至 n8 的 PEG 链上;一条 PEG 链的末端与至少一个官能团 F 连接(k≥1);所述 PEG 链和 F 之间可以直接连接(g=0),也可以通过连接基团 L0 与末端支化基团 G 间接连接(g=1);后者提供了更多的反应位点,可以结合更多的药物分子,增加药物负载量。八臂聚乙二醇衍生物具有中心对称或近似中心对称结构,因此在大规模生产中可以更精确地控制分子量,产品的分子量分布也更窄。因此,改性生物相关物质的性能更均匀、更可控。
Multifunctionalized polyethylene glycol derivative and preparation method therefor
申请人:XIAMEN SINOPEG BIOTECH CO., LTD.
公开号:US11324827B2
公开(公告)日:2022-05-10
Disclosed are a multifunctionalized polyethylene glycol derivative and a preparation method therefor. The derivative has an H-shaped structure as represented by formula (1) and comprises one linear core LPEG and four PEG branch chains, where n1, n2, n3, and n4 respectively are the degrees of polymerization of the branch chains, U1 and U2 are trivalent branching groups connecting the core LPEG to two of the PEG branch chains, F1 and F2 contain a functional group or a protected form R01 thereof and may or may not contain a branched group G, correspondingly, the number of R01 is one or more, F1 and F2 are either identical or different, any one linking group in the molecule or any linking group formed with an adjacent heteroatom group can either remain stable or be degraded, and any one PEG segment in the molecule is discretely polydispersed or monodispersed. The multifunctional polyethylene glycol is flexible and diverse in terms of branch structures and the lengths of branching arms, has various parameters and performance indicators that are adjustable and easy to control, and has a broad applicability.