Supplier Page from Thermo Fisher Scientific for 2,3-O-Isopropylidene-D-glyceraldehyde, 50% w/w in dichloromethane
2-Ethylaniline, 98% from Thermo Fisher Scientific
4-Ethylaniline, 99+% from Thermo Fisher Scientific
Ethyl 4-bromocrotonate, 75%, tech from Thermo Fisher Scientific
Ethyl phenylpropiolate, 98% from Thermo Fisher Scientific