(4S,4'S)-2,2'-(1,3-Bis[4-(t-butyl)phenyl)propane-2,2-diyl]bis(4-phenyl-4,5-dihydrooxazole) (S)-BTBBPh-SaBOX

Technical Note:
1. A chiral cage like copper (I) catalyst for the highly enantioselective synthesis of 1.1- cyclopropane diesters. 2.Direct catalytic asymmetric synthesis of ß-hydroxy acids from malonic acid.
3. Asymmetric intramolecular desymmetrization of meso-a,a -diazido alcohols with aryldiazoacetates.
4. Catalytic asymmetric [3+ 1]-cycloaddition re action of ylides with electrophilic metallo-enolcarbene
intermediates.
References:
1.Angew. Chem. Int. Ed., 2012, 51, 11620. 2. 2.Org. Lett., 2015, 17, 5962.
3.Org. L ett., 2016, 18, 1984.
4. Angew. Chem. int. Ed., 2017, 56, 7479.