5 research outputs found
The Synthesis and Initial Evaluation of MerTK Targeted PET Agents
MerTK (Mer tyrosine kinase), a receptor tyrosine kinase, is ectopically or aberrantly expressed in numerous human hematologic and solid malignancies. Although a variety of MerTK targeting therapies are being developed to enhance outcomes for patients with various cancers, the sensitivity of tumors to MerTK suppression may not be uniform due to the heterogeneity of solid tumors and different tumor stages. In this report, we develop a series of radiolabeled agents as potential MerTK PET (positron emission tomography) agents. In our initial in vivo evaluation, [18F]-MerTK-6 showed prominent uptake rate (4.79 ± 0.24%ID/g) in B16F10 tumor-bearing mice. The tumor to muscle ratio reached 1.86 and 3.09 at 0.5 and 2 h post-injection, respectively. In summary, [18F]-MerTK-6 is a promising PET agent for MerTK imaging and is worth further evaluation in future studies
Organocatalytic Asymmetric Synthesis of α‑Oxetanyl and α‑Azetidinyl Tertiary Alkyl Fluorides and Chlorides
Asymmetric
thiourea and squaramide catalysis provides access to
synthetically versatile α-oxetanyl and α-azetidinyl alkyl
halides exhibiting a tetrasubstituted chiral carbon center with high
yields and enantioselectivities. The products are readily transformed
with negligible erosion of enantiopurity and excellent diastereoselectivity
to a diverse group of multifunctional compounds including fluorooxindoles
with two contiguous chirality centers, fluorinated heterocyclic spiranes,
and polyspiro compounds
Organocatalytic Insertion of Isatins into Aryl Difluoronitromethyl Ketones
An
organocatalytic method that achieves insertion of isatins into
aryl difluoroÂnitroÂmethyl ketones under mild conditions
is described. The reaction occurs in the presence of 20 mol % of DBU
and with 100% atom economy. A series of isatin derived difluoroÂnitroÂmethyl
substituted tertiary alcohol benzoates and naphthoates were prepared
in 81–99% yield. The general synthetic usefulness of these
3-hydroxyÂoxindole derivatives is demonstrated with the selective
reduction to fluorooximes
The Synthesis and Initial Evaluation of MerTK Targeted PET Agents
MerTK (Mer tyrosine kinase), a receptor tyrosine kinase, is ectopically or aberrantly expressed in numerous human hematologic and solid malignancies. Although a variety of MerTK targeting therapies are being developed to enhance outcomes for patients with various cancers, the sensitivity of tumors to MerTK suppression may not be uniform due to the heterogeneity of solid tumors and different tumor stages. In this report, we develop a series of radiolabeled agents as potential MerTK PET (positron emission tomography) agents. In our initial in vivo evaluation, [18F]-MerTK-6 showed prominent uptake rate (4.79 ± 0.24%ID/g) in B16F10 tumor-bearing mice. The tumor to muscle ratio reached 1.86 and 3.09 at 0.5 and 2 h post-injection, respectively. In summary, [18F]-MerTK-6 is a promising PET agent for MerTK imaging and is worth further evaluation in future studies