The stereoselective synthesis of 3-substituted and 3,4-disubstituted piperidine and piperidin-2-one derivatives was achieved starting from 2-pyridone. After N-galactosylation and subsequent O-silylation, nucleophilic addition of organometallic reagents proceeded with high regioand stereoselectivity at 4-position. Substituents at position 3 were stereoselectively introduced by reaction of electr...

The crystal structures of 2-amino-2-thiazoline, C3H6N2S, and 2-amino-2-thiazolinium 2-naphthoxyacetate, C3H7N2S+.C12H9O3-, are reported. The structure of 2-amino-2-thiazoline consists of two unique molecules that construct a convoluted hydrogen-bonded ribbon involving R(2)2(8) graph-set association via both N-H...N and N-H...S interactions. The organic salt structure consists of the two molecul...

273 amino acids; 30133 Da. NKX2-2 is a member of the NK2 family of homeobox transcription factors. It has known roles in the development of the CNS as well as pancreatic beta cell differentiation. In the CNS NKX2-2 is known to be activated by SHH signaling which is important for its initial role in ventral patterning. NKX2-2 expression has additionally been shown to be critical for the differen...

The interleukin-2 molecule and receptor were the first of the interleukins to be discovered and characterized at the molecular level. Now after 20 years of effort, two groups have succeeded in determining the structure of IL2 bound to the external domains of the three receptor chains in a quaternary complex. What do we know now that we did not know before this structural information was availab...

Introducing a new cat into a household with one or more resident cats can be a significant source of stress for the cats involved. These studies sought to determine if rabbit maternal-neonatal pheromone (2-methyl-2-butenal [2M2B]) in litter impacted cat social behaviors and litter box use. Study 1 determined that cats preferred to eliminate in litter containing 2M2B; other semiochemicals tested...

The cloud point of copolymers of 2-ethyl-2-oxazoline and 2-n-propyl-2-oxazoline could be tuned from 25 degrees C to 100 degrees C by varying molecular weight and composition; the reversibility and concentration dependence of the cloud points were evaluated to assess the potential of these copoly(2-oxazoline)s as alternatives to poly(N-isopropylacrylamide).

introduction: β-carbolines are shown to have significant anti-inflammatory effect via the inhibition of some inflammatory mediators including tnf-α and pge2. in previous studies purkinje cell deterioration have been proposed the dominant pathogenesis of harmaline toxicity. win55, 212-2 is a non-selective cannabinoid cb1 and cb2 receptor agonist. combination of win55, 212-2 and am 251(cb1-select...

An inexpensive synthesis of 6-ethynylbipyridine has been accomplished using Sonogashira coupling of 2-bromo-6-iodopyridine with 2-methyl-3-butyn-2-ol. Subsequent Stille coupling with 2-(trimethylstannanyl) pyridine and hydrolysis provided the target compound in an overall high yield.