4-Methoxy-2-(trimethylsilyl)phenyl Trifluoromethanesulfonate

This compound is a white to light yellow crystalline solid with a melting point of 142-146°C.Its predicted boiling point is 322.4°C,and the density is 1.25.It shows low water solubility but is readily soluble in polar aprotic solvents such as tetrahydrofuran,DMF,and methanol,with moderate solubility in ethyl acetate and dichloromethane.Critical for handling,it requires storage under dry,inert conditions(2-8°C)in a sealed,light-protected container due to the moisture sensitivity of the triflate group and the potential lability of the silyl moiety under protic or acidic conditions.It is incompatible with strong nucleophiles,oxidants,acids,and bases.

Methoxy-2-trimethylsilylphenyl)trifluoromethanesulfonate is a sophisticated,orthogonally protected electrophilic coupling partner engineered for complex synthesis.It strategically combines a super-leaving triflate group(-OTf)with a sterically shielding and versatile trimethylsilyl(TMS)group ortho to it,and an electron-donating methoxy group para to it.This design serves dual purposes:the TMS group acts as a temporary steric shield and regiochemical director during cross-coupling reactions(e.g.,in Stille or Hiyama couplings,or Suzuki couplings after in-situ desilylation),and can later be converted into other functionalities(e.g.,-H,-I,-OH)via well-established protocols,enabling multi-step,sequential functionalization of the arene ring.

1.Pharmaceutical Synthesis

Employed in the late-stage functionalization and total synthesis of complex natural products and drug molecules requiring polysubstituted aromatic rings with precise substitution patterns.It allows for the iterative,regiocontrolled introduction of different aryl groups onto a single aromatic core,a critical strategy in optimizing drug properties like solubility and metabolic stability.

2.Agrochemical R&D

Used to construct elaborate,multi-ring systems found in modern fungicides and insecticides that target specific enzymes with high selectivity.The ability to precisely control the substitution pattern around the aromatic core is essential for fine-tuning the molecule's shape and electronic properties to maximize target binding and minimize off-target effects.

3.Functional Material Synthesis

A vital precursor for synthesizing perfectly defined oligomers and monomers for organic electronics.In materials like molecular wires,liquid crystals,or porous organic polymers,the exact placement of substituents dictates properties such as conjugation length,intermolecular packing,and porosity.This reagent provides the necessary control to achieve such precision.

4.Organic Synthesis Building Block

A specialized tool for methodology development in C-H functionalization and sequential cross-coupling.It is a test substrate for reactions where the TMS group can act as a directing group or a traceless protecting group,enabling novel routes to functionalized arenes that are not accessible via direct substitution.