(S)-2-[[3,5-Bis(trifluoromethyl)phenyl]thioureido]-N-benzyl-N,3,3-trimethylbutanamide, 95%, (98% ee)

Technical Notes:
1.aza-MichaeI Reaction - Catalyst for the formal addition of ammonia to nitroalkenes, affording optically active
ß-amino nitro compounds in high yields and enantioselectivities. The approach is based on a novel thiourea- catalyzed aza-MichaeI reaction, by which benzophenone imine serves as a masked ammonia equiv., which is released by hydrolysis.
2.Diels-Alder Reaction - A variety of organocatalysts were screened for the catalysis of the naphthoquinone monoketal Diels-Alder reaction.
References:
1.Chem.-Eur. J., 2010, 16, 13330-13334
2. Beilstein J. Org. Chem., 2013, 9, 1414-1418.