The direct aldolreaction of an alpha-alkyl-alpha-oxo aldehyde was catalyzed by trifluoromethyl-substituted diarylprolinol 1 to afford a gamma-oxo-beta-hydroxy-alpha-substituted aldehyde in good yield with excellent anti-selectivity and excellent enantioselectivity.
Photochemical Reactions. Part 67. photochemistry of saturated aliphatic and cyclic ?-keto sulfoxides (C??S)- and ?-cleavage - A new case of photostereomutation
作者:C. Ganter、J.-F. Moser
DOI:10.1002/hlca.19710540761
日期:1971.11.1
The photochemical behaviour of saturated aliphatic (2, 4, and 5) and bicyclic (18 and 19) β-keto sulfoxides has been studied. Photostereomutation of the sulfoxide group was observed on irradiation of 4a, 4b, 18, and 19. Most likely an internal energy transfer from the excited carbonyl to the sulfoxide group is operating on direct irradiation of such compounds.