689203
3,4-二羟基-3-环丁烯-1,2-二酮
Arxada quality, 98.50-101.00 % (w/w) (HPLC)
别名:
方形酸
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关于此项目
线性分子式:
(HO)2C4(=O)2
化学文摘社编号:
分子量:
114.06
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
EC Number:
220-761-4
Beilstein/REAXYS Number:
774275
MDL number:
InChI
1S/C4H2O4/c5-1-2(6)4(8)3(1)7/h5-6H
InChI key
PWEBUXCTKOWPCW-UHFFFAOYSA-N
SMILES string
OC1=C(O)C(=O)C1=O
quality
Arxada quality
manufacturer/tradename
Arxada AG
concentration
98.50-101.00 % (w/w) (HPLC)
impurities
≤0.5 % (w/w) water (Karl Fischer)
mp
>300 °C (lit.)
signalword
Danger
hcodes
Hazard Classifications
Eye Dam. 1 - Skin Corr. 1B
存储类别
8A - Combustible corrosive hazardous materials
wgk
WGK 3
flash_point_f
374.0 °F
flash_point_c
190 °C
ppe
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
法规信息
新产品
此项目有
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A minimalist squaramide-based chemodosimeter for Cu(2+) is described. Upon selective chelation to 2, Cu(2+) induces the formation of a highly colored zwitterionic radical, which is kinetically stable for hours. The presence of a radical is confirmed by EPR and ESI-MS.
Carsten Dingels et al.
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The covalent attachment of poly(ethylene glycol) (PEG) to therapeutically active proteins (PEGylation) has become an important method to deal with the pharmacological difficulties of these polypeptides, such as short body-residence times and immunogenicity. However, the derivatives of PEG used for
Dawei Cui et al.
Chemical communications (Cambridge, England), 47(4), 1348-1350 (2010-11-18)
We report a class of water-soluble and -stable cyclic amino squarates that ligate with cysteine or lysine residues without side-products in an entirely aqueous environment. The ligations include addition-elimination reactions that are promoted by water in a way similar to
Vijayakumar Ramalingam et al.
Organic letters, 10(15), 3315-3318 (2008-07-02)
Environment-sensitive binding of anions to synthetic receptors is important for the functional mimicry of ion channels. We describe new squaramide-based chloride ion receptors whose anion binding cavity can be opened and closed by using carbonyl groups as valves. In nonpolar
Jørn E Tungen et al.
Organic letters, 14(23), 5884-5887 (2012-11-15)
Asymmetric iodolactonization of γ- and δ-unsaturated carboxylic acids has been explored in the presence of six different chiral organocatalysts 5-8. The catalyst 6b was found to facilitate the cyclization of 5-arylhex-5-enoic acids 1 to the corresponding iodolactones 2 with up
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