Supplier Page from Thermo Fisher Scientific for 3-Butynyl p-toluenesulfonate, 96%
2-Ethoxyethyl ether, 98+%, extra pure from Thermo Fisher Scientific
9-Fluorenone, 99+% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Ethyltriphenylphosphonium bromide, 98% from Thermo Fisher Scientific