65 research outputs found
41-Azido-41-deÂoxyÂrapamycin
The title compound, C51H78N4O12, is a derivative of rapamycin, a triene macrolide antiÂbiotic molÂecule isolated from Streptomyces hygroscopicus. The macrocyclic ring structure has 15 chiral centres, with one of the substituent hyÂdroxy groups giving an intraÂmolecular hydrogen bond to a ketone O-atom acceptor. The molÂecules also form interÂmolecular hyÂdroxy–ketone O—Hâ‹ŻO hydrogen-bonding associations, giving one-dimensional chains extending along (010). The crystal has 108 Å3 solvent-accessible voids
Uncoupling TORC2 from AGC kinases inhibits tumour growth
Cancer
Research UK, the Francis Crick Institute and Barts Cancer
Institute
Ras/Raf/MEK/ERK and PI3K/PTEN/Akt/mTOR Cascade Inhibitors: How Mutations Can Result in Therapy Resistance and How to Overcome Resistance
The Ras/Raf/MEK/ERK and PI3K/PTEN/Akt/mTOR cascades are often activated by genetic alterations in upstream signaling molecules such as receptor tyrosine kinases (RTK). Integral components of these pathways, Ras, B-Raf, PI3K, and PTEN are also activated/inactivated by mutations. These pathways have profound effects on proliferative, apoptotic and differentiation pathways. Dysregulation of these pathways can contribute to chemotherapeutic drug resistance, proliferation of cancer initiating cells (CICs) and premature aging. This review will evaluate more recently described potential uses of MEK, PI3K, Akt and mTOR inhibitors in the proliferation of malignant cells, suppression of CICs, cellular senescence and prevention of aging. Ras/Raf/MEK/ERK and Ras/PI3K/PTEN/Akt/mTOR pathways play key roles in the regulation of normal and malignant cell growth. Inhibitors targeting these pathways have many potential uses from suppression of cancer, proliferative diseases as well as aging
ChemInform Abstract: ABSENCE OF STEREOELECTRONIC CONTROL IN THE PHOTOCHEMISTRY OF TWO DIASTEREOMERIC β,Γ-EPOXY KETONES
ChemInform Abstract: PYROLYSIS OF THE TOSYLHYDRAZONE SODIUM SALTS OF TWO BICYCLIC LACTONES
ChemInform Abstract: PHOTOCHEMICAL REARRANGEMENTS OF β,Γ-CYCLOPROPYL-β′,Γ′-EPOXY KETONES
ChemInform Abstract: TWO EFFICIENT METHODS FOR REPLACEMENT OF SULFUR BY OXYGEN IN A THIONOLACTONE
ChemInform Abstract: PHOTOCHEMISTRY OF TWO β,β′-EPOXY KETONES, 3-OXATRICYCLO(3.2.1.02,4)OCTAN-8-ONE AND 3-OXATRICYCLO(3.3.1.02.4)NONAN-9-ONE. INTRAMOLECULAR REACTIONS OF α,β-UNSATURATED ALDEHYDO KETENES
ChemInform Abstract: PHOTOCHEMISTRY OF 4-ISOBUTYL-4-METHYL- AND 4-(2-METHOXYETHYL)-4-METHYL-2-CYCLOPENTENONE. STEREOCHEMICAL EFFECTS IN INTRAMOLECULAR ABSTRACTION OF HYDROGEN BY THE β-CARBON ATOM OF CYCLOPENTENONES
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