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Ureido

Im Gegensatz dazu fiihrt die Reduktion mit einem groBen Natriumboranat-UberschuB unter Ringspaltung zu 2-Ureido-athanol2. [Pg.138]

C7Hi8N304 Methyl 3-amino-2,3-dideoxy-2-ureido-/ -xylopyranoside DURMXP 43 371... [Pg.385]

Figure 3.1 Quadruple hydrogen-bonded 2-ureido-4-pyrimidinone units attached to the ends of a polydimethylsiloxane chain assemble to create materials with viscoelastic properties. Figure 3.1 Quadruple hydrogen-bonded 2-ureido-4-pyrimidinone units attached to the ends of a polydimethylsiloxane chain assemble to create materials with viscoelastic properties.
Sbntjens SHM, Sijbesma RP, van Gendeten MHP, Meijer EW. Stability and lifetime of quad-ruply hydrogen bonded 2-ureido-4[lH]-pyrimidinone dimers. J Am Chem Soc 2000 122 7487-7493. [Pg.100]

Figure 5.12 Self-associative hydrogen bonded polymer networks based on (a) 2-ureido-4[lH]-pyrimidone (UPy), (b) 1,2,4-triazine, and (c) urazole carboxylic acid. Figure 5.12 Self-associative hydrogen bonded polymer networks based on (a) 2-ureido-4[lH]-pyrimidone (UPy), (b) 1,2,4-triazine, and (c) urazole carboxylic acid.
Figure 5.13 Self-associative polymer network formed via the dimerization of 2-ureido-4[lH]-pyrimidone groups attached to the polymer backbone. Figure 5.13 Self-associative polymer network formed via the dimerization of 2-ureido-4[lH]-pyrimidone groups attached to the polymer backbone.
Auch die Umsetzung von 2-Amino-l,3,4-oxadiazolen mit mindestens drei Mol Isocyanat ver-lauft unter Bildung von 5,7-Dioxo-6,7-dihydro-5II-[Pg.611]

Dioxo-6,7-dihydro-5H- bzw. 5,7-Dithiono-6,7-dihydro-5H- werden auch aus 2-Ureido- bzw. 2-Thioureido-1,3,4-oxadiazolen hergestellt672. [Pg.611]

Mit aromatischen Amin-Hydrochloriden erfolgt Ringspaltung zu 1 -Aryl-2-ureido-amidi-nen oder 1-Aeylamino-guanidinen724, die zu 3-Hydroxy- bzw. 3-Amino-1,2,4-triazole n cyclisiert werden konnen726. [Pg.617]

Related 2-deoxy-2-ureido-D-glucose derivatives can be obtained by direct reaction of phenyl isocyanate or silver isocyanate with LXXXIII, the former giving LXXXVIII, whereas the latter affords the free 2-ureido derivative LXXXIX.164,188 This reaction contrasts with the behavior of LXXXIII with isothiocyanates, which react at Cl (see p. 244). [Pg.254]

Deoxy-2-ureido derivatives of D-glucose have been known for many years,189,190 but only recently have their properties been studied in detail. The acetate esters show a marked resistance to catalytic de-O-acetylation with sodium methoxide, only the 1-O-acetyl group being removed.164 This behavior resembles that of 1,3,4,6-tetra-0-acetyl-2-deoxy-2- iV,iV-bis[2-... [Pg.254]

The 2-amino group also reacts with alkyl or phenyl isocyanates or phenylisothiocyanates to form 2-ureido derivatives, which cyclize to give tetrahydropyrimidobenzodiazepines (87H175,87S379) (Scheme 57). [Pg.45]

S-diester-thioureid E2, 758 -O.S-diester-ureid E2, 758, 759 -0,0-diester-S-(2-ureido-et)iylester) E2, 718 -S-(l,2-diethoxycarbonyl-ethy tester)-0,0-diethyl-ester XII/2, 667, 715... [Pg.996]

Meijer et al. reported the self-aggregation behavior of a molecule in chloroform (Fig. 11.8) containing two units of 2-ureido-4-pyrimidone linked through a spacer (which self-associates in the DDAA-AADD pattern strongly with a dimerization constant >106 m ) [36], This compound formed viscous solutions in chloroform, and the viscosity observed was dependent on the concentration and temperature. [Pg.369]

Cdk2/cyclin inhibitors consisting of 2-ureido-thiazoles, (II), 2-carbonylamino-thiazoles (III), and 4,5,6,7-tetrahydro indazole derivatives, (IV), were previously prepared by the authors (2 1), respectively, and were effective in treating cell proliferative disorders associated with altered cell-dependent kinase activity. [Pg.523]

The relative insensitivity of this class of Ni catalysts to polar functional groups, and especially their low oxophilicity, is another important characteristic. This property has been exploited for the development of novel polymeric materials that might find new applications. For example, 1-hexene has been copolymerized with 6-(2-ureido-4-[lH]-pyrimidinone)hex-l-ene (30) to generate a new poly(olefin) elastomer (equation 7). The dimerization (through H-bonding) of the pyrimidinone moieties forms noncovalent crosslinks that bestow unique properties to the otherwise amorphous poly(l-hexene) matrix. [Pg.2923]

Dichlor-2-hydroxy-tetrafluor-2-ureido- E14a/2, 64 (Keton/Harnstofl)... [Pg.61]

Hexafluor-2-hydroxy-2-ureido-E14a/2, 64 (Keton/Harnstofl) Hexahalogen-2-hydroxy-2-sulfinyla-mino- E14a/2, 18 (R-CHO/R-SO-NH2)... [Pg.61]

Dioxo-l-ethyl-1,2-dihydro-E4, 220 (NH - N-C2H5) Quinazolin 2,4-Dihydroxy-7-methoxy- E9b/2, 12 (2-Ureido-... [Pg.592]

See other pages where Ureido is mentioned: [Pg.887]    [Pg.206]    [Pg.122]    [Pg.240]    [Pg.607]    [Pg.910]    [Pg.254]    [Pg.255]    [Pg.83]    [Pg.107]    [Pg.371]    [Pg.371]    [Pg.162]    [Pg.168]    [Pg.168]    [Pg.28]    [Pg.115]    [Pg.124]    [Pg.314]    [Pg.465]    [Pg.731]    [Pg.876]   
See also in sourсe #XX -- [ Pg.611 ]



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2-ureido-4-pyrimidone

3-Phenyl-4-ureido

Glucose 2-deoxy-2-ureido

Hydantoin, 5-Ureido

Methyl 3-amino-2,3-dideoxy-ureido-/?-xylopyranoside

Poly ureido-pyrimidinone

Pyridines 1-ureido

Ureido anion

Ureido complexes

Ureido pyrimidinone

Ureido-balhimycin

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