53733-94-1Relevant articles and documents
Study on a series of water-soluble photoinitiators for fabrication of 3D hydrogels by two-photon polymerization
Huang, Xing,Wang, Xiaopu,Zhao, Yuxia
, p. 413 - 419 (2017/03/24)
A series of water-soluble benzylidene cyclanone dyes T1-T3 were synthesized. Their photo-physical properties were investigated using UV–Vis spectra, fluorescence spectra and two-photon absorption spectra. The maximum two-photon absorption cross-sections (σ2) of T1-T3 in deionized water were determined as 567?GM, 808?GM and 231?GM. Using T1-T3 as photoinitiators (PIs) directly, 2D and 3D nano patterns based on two-photon crosslinking or polymerization of bovine serum albumin (BSA), water-soluble acrylic ester monomer (SR610) and hyaluronic acid derivative (HAGM) were successfully fabricated, respectively. Much lower threshold energies and wider fabrication windows were obtained in the formulations containing these PIs compared with commercial ones. Furthermore, the cytotoxicity study showed a favorable biocompatibility of these PIs, which indicated T1-T3 would have application prospects in 3D fabrication of biomaterials.
Synthesis and quantitative structure-activity relationship of imidazotetrazine prodrugs with activity independent of O6-methylguanine-DNA- methyltransferase, DNA mismatch repair, and p53
Pletsas, Dimitrios,Garelnabi, Elrashied A.E.,Li, Li,Phillips, Roger M.,Wheelhouse, Richard T.
, p. 7120 - 7132 (2013/10/01)
The antitumor prodrug temozolomide is compromised by its dependence for activity on DNA mismatch repair (MMR) and the repair of the chemosensitive DNA lesion, O6-methylguanine (O6-MeG), by O6-methylguanine-DNA-methyltransferase (E.C. 2.1.1.63, MGMT). Tumor response is also dependent on wild-type p53. Novel 3-(2-anilinoethyl)-substituted imidazotetrazines are reported that have activity independent of MGMT, MMR, and p53. This is achieved through a switch of mechanism so that bioactivity derives from imidazotetrazine-generated arylaziridinium ions that principally modify guanine-N7 sites on DNA. Mono- and bifunctional analogues are reported, and a quantitative structure-activity relationship (QSAR) study identified the p-tolyl-substituted bifunctional congener as optimized for potency, MGMT-independence, and MMR-independence. NCI60 data show the tumor cell response is distinct from other imidazotetrazines and DNA-guanine-N7 active agents such as nitrogen mustards and cisplatin. The new imidazotetrazine compounds are promising agents for further development, and their improved in vitro activity validates the principles on which they were designed.
An efficient ZrCl4 catalyzed aza-michael addition reaction: Synthesis of C-linked carbo β3-amino acids
Damera, Krishna,Reddy, Katta L.,Sharma, Gangavaram V.M.
experimental part, p. 151 - 155 (2010/04/23)
A mild aza-Michael protocol has been developed using ZrCl4 as catalyst on α, β-unsaturated esters and nitriles. The aromatic amines were found to give the products with ease. The ZrCl4 mediated route was compatible with acid sensitive carbohydrate esters and provided an efficient method to prepare C-linked carbo β3-amino acids (β3-Caa).