نتایج جستجو برای: n arylmethylene 4 imino 5
تعداد نتایج: 2737236 فیلتر نتایج به سال:
Iodine-catalyzed reaction of indoles with α,α'-bis(arylmethylene)cyclopentanones afforded one diastereomer of the corresponding Michael adducts, namely, E-2-(3-indolylphenylmethyl)-5-phenylmethylenecyclopentanones, in a good yield. The products form a new group of indole derivatives.
The title compound, C(10)H(12)N(4)O(2), was prepared as an inter-mediate for the synthesis of metamitron. The benzene ring plane forms dihedral angles of 66.0 (1) and 3.5 (5)° with the hydrazine plane and the acetyl-imino plane, respectively. The crystal structure involves inter-molecular N-H⋯O hydrogen bonds.
In the title Schiff base, C(16)H(16)ClNO(2), the 2-(4-methoxy-phen-yl)ethyl (CH(3)OC(6)H(4)CH(2)CH(2)-; r.m.s. deviation = 0.10 Å) and 4-chloro-2-(imino-meth-yl)phenol (N=CHC(6)H(3)ClOH; r.m.s. deviation = 0.01 Å) portions are both essentially planar, the two parts being inclined at an angle of 61.8 (1)°. The hydroxy group forms a hydrogen bond to the imino N atom.
In the hydrated title salt, C 7 H 12 N 5 S 2 + ·Cl − ·H O, asymmetric unit comprises one 2-amino-5-{(1 E )-1-[(carbamothioylamino)imino]ethyl}-4-methyl-1,3-thiazol-3-ium cation, chloride anion and water molecule of crystallization. The cation is nearly flat (r.m.s. deviation non-H atoms 0.0814 Å), with largest 0.1484 (14) Å observed for methyl atoms. crystal, cations are linked by O—H...Cl, N—H...
5-Hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC), and 5-carboxylcytosine (5caC) form during active demethylation of 5-methylcytosine (5mC) and are implicated in epigenetic regulation of the genome. They are differentially processed by thymine DNA glycosylase (TDG), an enzyme involved in active demethylation of 5mC. Three modified Dickerson-Drew dodecamer (DDD) sequences, amenable to cryst...
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