Catalyst- and excess reagent recycling in aza-Michael additions
Lilla Maksó,
Boglárka Szele,
Dávid Ispán
et al.
Abstract:16α-Azolyl-pregnenolone derivatives were prepared via 2-butyl-1,1,3,3-tetramethylguanidine (nBu-TMG) catalysed aza-Michael addition of 16-dehydropregnenolone (16-DHP) carried out in [bmim][BF4]. The application of the guanidine base and the imidazolium ionic liquid made it...
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