Desoxyanisoin

Reinforcing thermosets using crystalline desoxyanisoin structures[Reference: WebLink]

Journal of Applied Polymer Science.Volume 131, Issue 3, February 5, 2014

This article presents results on the potential of using crystalline flame retardants for thermoset reinforcement.
METHODS AND RESULTS:
The approach involves introducing reinforcement in thermosetting polymers through low molecular weight crystallizable additives. Thermally induced phase separation (TIPS) and crystallization of Desoxyanisoin in diglycidylether of bisphenol-A (DGEBA) epoxy monomer were investigated. Small angle light scattering and polarized optical microscopy were utilized to monitor phase separation and the crystallization of Desoxyanisoin in DGEBA at different concentrations. Reaction induced phase separation (RIPS) with polyetheramine was carried out under isothermal and temperature gradient curing conditions. Altering the cure schedule resulted in a rich range of morphologies due to the competition between TIPS and RIPS. During isothermal cure, straight fiber-like anisotropic crystals on a centimeter length scale developed.
CONCLUSIONS:
In contrast, thermal gradients frustrated the crystal growth and resulted in complex and rich morphologies. Desoxyanisoin provided marginal epoxy thermoset reinforcement at 10 vol %. However, the additive did not increase the thermoset flammability retardancy.

Canadian Journal of Chemistry, 1993, 71(9): 1327-1333, 10.1139/v93-171

Synthesis and preliminary in vitro biological activity of non-steroidal cytotoxic estrogens designed for the treatment of breast cancer[Reference: WebLink]

The development of resistance to endocrine therapy as well as chemotherapy is presently a major problem in the treatment of breast cancer.
METHODS AND RESULTS:
To minimize this obstacle, new, more selective and potent, chemotherapeutic agents should be designed. One way to improve selectivity is to link a cytotoxic moiety to a molecule possessing an affinity to the estrogen receptor (ER). The latter would be used to direct the cytotoxic portion of the molecule towards the target cells. Our initial approach led us to the synthesis of new triphenylethylene–platinum(II) complexes 1a–c. The commercially available Desoxyanisoin (10) was efficiently transformed in seven steps into the platinum(II) complexes 1a–c with an overall yield exceeding 30%.
CONCLUSIONS:
The biological activity of compounds 1a–c was evaluated in vitro on ER+ and ER− human breast tumor cell lines: MCF-7 and MDA-MD-231.