1.
J Org Chem
; 75(23): 8303-6, 2010 Dec 03.
Article
in English
| MEDLINE
| ID: mdl-21058658
ABSTRACT
Ureas, carbamoyl derivatives, amides, and sulfonamides can be easily prepared from the strained (R,R)-cylohexanediamine urea (1) in high yield, leaving a free amino group that shows good catalytic activity in intramolecular aldol condensations. The preparation of Wieland-Miescher ketone has been studied with these catalysts.