chemoselective
/ˌkiːməʊsɪˈlɛktɪv/ /ˌkɛməʊsɪˈlɛktɪv/Chemistry
adjective
Of a chemical reaction or procedure: involving a particular functional group in preference to one or more others which are available.
Origin
1970s; earliest use found in Tetrahedron. From chemo- + selective.