3-[[3,5-Bis(trifluoromethyl)phenyl]amino]-4-[[(1S,2S)-2-(1-pyrrolidinyl)cyclohexyl]amino]-3-cyclobutene-1,2-dione, 98%, (99% ee)

Technical Notes:1.Mannich Reaction: The asymmetric addition of the present HWE reagents to N-ca rbamoyl iminesgenerated in situ was achieved. The corresponding Mannich adducts can be further transformed to aza- MBH...