Definition of tosyl in English:

tosyl

noun

Chemistry
  • [as modifier] Of or denoting the toluene-4-sulphonyl radical —SO₂C₆H₄CH₃, used in organic synthesis.

    • ‘The choice of TsSePh, rather than a tosyl halide, as the precursor of tosyl radical is based on the greater stability of the resulting selenides with respect to elimination compared to the halides.’
    • ‘In all experiments superparamagnetic particles of 4.5-m diameter (Dynabeads, Dynal, Hamburg, Germany) exhibiting reactive tosyl groups on the surface were used as magnetic tweezers.’

Origin

1930s: from German, from to(luol) and s(ulphon)yl.

Pronunciation:

tosyl

/ˈtäsəl/