Originally posted by samsung
np
Also if you are unsure about the purity of your 1-(3-bromo,4-methoxypheny)-2-nitroethene it is advisable to isolate and recrystalize this intermediate
before proceeding with the Pd/C reaction to get those high yields.
I have repeatedly observed moderate to poor yields when the isolated IPA layer from a post aq IPA/NaBH4 reduction was directly used in the Pd/C
reduction. |