Chemicals list & Research Gallery
CAS number: 125343-14-8
Triterpenes are defined as a major category of secondary metabolites that consist of 30 carbon atoms arranged in six isoprene units, derived from the squalene synthesis pathway. They can be transformed into various compounds, including alcohols, aldehydes, carboxyl acids, and saponins (triterpene glycosides).
Irregular triterpenes.
CAS number: 12654-97-6
Triazine is a heterocyclic six-membered benzene ring containing three nitrogen atoms in the benzene ring.
Design Concept for Triazine-Based Allylating Reagents
CAS number: 127-09-3
Sodium acetate is the trihydrate sodium salt of acetic acid with alkalinizing, diuretic and electrolyte replacement properties.
(A) Ligation of AOB to phage-displayed aldehydes is accelerated by aniline, but preincubation of phage with aniline in the absence of AOB leads to rapid loss of aldehyde and loss of reactivity toward AOB. (B) In anilinium acetate, pH 4.7, the aldehyde disappears with t1/2 ∼40 min; however, aldehydes alone are stable at the same pH in sodium acetate buffer.
CAS number: 127-65-1
Chloramine T is an organic sodium salt derivative of toluene-4-sulfonamide with a chloro substituent in place of an amino hydrogen.
Reagents and conditions: (a) Pd(PPh3)4, (SnBu3)2, toluene, reflux, 22 h; (b) NaI, chloramine-T, 94% EtOAc, 4% DMF, 1% AcOH, 1% H2O, room temp, 30 min, Na2S3O5; (c) NaOH, 1 h; (d) 3 mCi Na125I and chloramine-T in a mixture of 94% EtOAc, 4% DMF, 1% AcOH, and 1% H2O, room temp, 30 min, Na2S3O5.
CAS number: 128-08-5
N-bromosuccinimide is a five-membered cyclic dicarboximide compound having a bromo substituent on the nitrogen atom. It has a role as a reagent.
Formation and reaction of PdII complex 2. NBS = N-bromosuccinimide, NCS = N-chlorosuccinimide.
![Synthesis of aminyl diradicals 1 and 2. a) NBS in chloroform, NaHCO3, Na2SO4, -40℃ for 1 h, then 08C for 2 h, 35%. b) 4-tert-butylphenylboronic acid or 4-tert-undecylphenylboronate, [Pd(PPh3)4], Na2CO3, benzene/EtOH/water, 908C (5: 62% yield, 6: 43% yield). c) nBuLi (2.4 equiv), THF/hexane, ca. -30℃ for 1 h, then solvent change to THF or 2-MeTHF, and I2 (1.06 equiv) at -90℃ or titration with I2 at -90 to -115℃ monitored by EPR spectroscopy. NBS=N-bromosuccinimide.](http://www.wlxkc.cn/picture/3912354_05.png)
Synthesis of aminyl diradicals 1 and 2. a) NBS in chloroform, NaHCO3, Na2SO4, -40℃ for 1 h, then 08C for 2 h, 35%. b) 4-tert-butylphenylboronic acid or 4-tert-undecylphenylboronate, [Pd(PPh3)4], Na2CO3, benzene/EtOH/water, 908C (5: 62% yield, 6: 43% yield). c) nBuLi (2.4 equiv), THF/hexane, ca. -30℃ for 1 h, then solvent change to THF or 2-MeTHF, and I2 (1.06 equiv) at -90℃ or titration with I2 at -90 to -115℃ monitored by EPR spectroscopy. NBS=N-bromosuccinimide.
Bromolactonization of compound 6h. NBS=N-bromosuccinimide.
CAS number: 128-09-6
Chlorosuccinimide is used as a chlorinating agent, disinfectant for swimming pools, and bactericide.
Formation and reaction of PdII complex 2. NBS = N-bromosuccinimide, NCS = N-chlorosuccinimide.
CAS number: 1330-20-7
Xylene, [mixed isomers] appears as a clear colorless liquid with a characteristic aromatic odor consisting of a mixture of the three isomers (ortho-, meta- and para-).
![UV-vis spectra (a) and emission spectra (b) of ASDSN chromophore at concentration of 10▔5 M in different solvents. The photographs of the chromophore in different solutions [from left to right, xylene, dichloromethane (DCM), ethyl acetate (ETA), ethanol, and dimethyl formamide (DMF)] were taken under natural daylight simulator (D65) lamps (top image), and irradiation of A-Class UV lamps (bottom image) (c).](http://www.wlxkc.cn/picture/3214957_07.png)
UV-vis spectra (a) and emission spectra (b) of ASDSN chromophore at concentration of 10▔5 M in different solvents. The photographs of the chromophore in different solutions [from left to right, xylene, dichloromethane (DCM), ethyl acetate (ETA), ethanol, and dimethyl formamide (DMF)] were taken under natural daylight simulator (D65) lamps (top image), and irradiation of A-Class UV lamps (bottom image) (c).
Synthetic pathway towards substituted polyphenylene dendrimers.
CAS number: 133248-01-8
Dehydran 240, produced by BASF, is a modified polyalkylene glycol used as a foam-inhibiting wetting agent in emulsion paints and as a defoamer in textile printing and glue applications.
Concept: 2- and 6-trifluoromethyl-containing purines and 1-deazapurines as inhibitors of adenosine deaminase (ADA).
CAS number: 133398-13-7
Tuberculostearic acid, (R)- consists of an 18-carbon chain with a methyl branch at the 10th carbon and a chiral center, existing specifically in the (R)-enantiomeric form.
Formal Synthesis of (R)-Tuberculostearic Acid (11)
CAS number: 13463-67-7
Titanium dioxide (TiO2) is considered as an inert and safe material and has used in many applications for decades.
(a) Total and projected densities of states (DOS) of the anatase TiO2 structure and (b) molecular orbital bonding structure for anatase TiO2. Copyright 2004 The American Physical Society.
Three schemes of the band gap modifications of TiO2 match the solar spectrum: (a) a higher shift in valence band maximum (VBM); (b) a lower shift in conduction band minimum (CBM); and (c) continuous modification of both VBM and CBM.
TiO2 nanoparticles with different doping elements.