From: Improved one-pot synthesis of N, N-diisopropyl-3-(2-Hydroxy-5-methylphenyl)-3-phenyl propanamide; a key intermediate for the preparation of racemic Tolterodine
Entry
Coumarin
Catalyst
Moles
Temparature
Yield (%)a
1.
2
Acetic acid
1
25-30°C
50
2.
55
3.
3
57
4.
4
75
5.
5