Supplier Page from Thermo Fisher Scientific for (R,R)-(-)-2-Amino-1-phenylpropyldiphenylphosphine, 97+%
4-Bromobutyric acid, 98% from Thermo Fisher Scientific
Diethyl carbonate, 99% from Thermo Fisher Scientific
Ethyl acetoacetate, 99%, pure from Thermo Fisher Scientific
Sulfanilamide, 98% from Thermo Fisher Scientific