RCOOH --> RCNR2

[psycosmo]

Synthesis Communications, Oct, 1978 p. 766
Reactions of Sodium Borohydride in Acidic Media; N-alkylation of aliphatic secondary amines with carboxylic acids
By Gribble, Jasinsky, Pellicone, Panetta @ Dartmouth College
----
Uses NaBH4 to repace the OOH if COOH with a secondary amine. Seemed like it might be useful if it hasnt been posted here before...

[Rhodium]

There is some info about that to be found in

https://www.thevespiary.org/rhodium/Rhodium/pdf/nabh4.carboxylic.acids.pdf