t-Boc-Aminooxy-PEG1-azide | CAS 2100306-67-8

t-Boc-Aminooxy-PEG1-azide is a PEGylated aminooxy-functionalized azide reagent designed for bioorthogonal click chemistry workflows. As an azide-bearing click handle, it is commonly used to enable conjugation strategies that pair with complementary cyclooctyne or strained-alkyne partners, while the aminooxy group provides an orthogonal handle for oxime-based linkage chemistry in downstream labeling or material functionalization. The presence of a short PEG spacer improves solubility and reduces nonspecific interactions in labeling and surface modification contexts, making this reagent a practical building block for research-grade probe construction and biomaterials derivatization.

1. Bioorthogonal Probe Labeling

t-Boc-Aminooxy-PEG1-azide is used to incorporate an azide click handle into fluorescent, affinity, or mass-tagging probes intended for cellular and biochemical assays. Researchers often rely on this reagent when they want a compact PEG spacer to improve handling in aqueous buffers and to support efficient conjugation to cyclooctyne-based imaging reagents or detection platforms. The aminooxy functionality enables an additional, orthogonal linkage step after azide installation, supporting multi-component probe assembly where spatially separated functional groups are required for consistent labeling performance.

2. Oxime Linker Construction

t-Boc-Aminooxy-PEG1-azide serves as a convenient precursor for constructing oxime-based conjugates, particularly when an aminooxy group must be positioned alongside a click-reactive azide for sequential or modular labeling schemes. In chemical biology workflows, this reagent is frequently selected to build conjugation-ready intermediates that can be activated or deprotected to generate an aminooxy-reactive site while retaining the azide for later click coupling. The result is a versatile platform for preparing conjugates used in pull-down experiments, reagent labeling kits, and modular reagent libraries where orthogonality reduces cross-reactivity during multi-step assembly.

3. Biomaterials Surface Functionalization

t-Boc-Aminooxy-PEG1-azide is applied to functionalize biomaterial surfaces and polymer scaffolds where azide-bearing linkers are needed to attach biomolecules, capture agents, or reporter moieties through click chemistry. The PEG1 spacer helps mitigate steric crowding and supports more uniform grafting of reactive groups on hydrophilic or mixed-surface coatings, which is valuable for constructing reproducible material interfaces. Downstream, the aminooxy group can be leveraged to introduce additional binding or coupling chemistry, enabling layered surface architectures used in biosensing, affinity capture materials, and research-scale material characterization.

4. Molecular Imaging Reagent Assembly

t-Boc-Aminooxy-PEG1-azide is used as a building block to assemble imaging reagents and labeling constructs that require a reliable azide click handle for coupling to cyclooctyne-functional imaging probes. Molecular imaging and chemical biology teams often choose this reagent when they need a balance of aqueous compatibility and orthogonal reactivity to integrate multiple components, such as targeting ligands and reporter tags, into a single conjugate workflow. The PEG spacer and aminooxy handle support modular synthesis of probe families, facilitating rapid iteration of labeling formats for microscopy, spectroscopy, or analytical readouts in research settings.