Page 185 - Catalysts for Fine Chemical Synthesis Vol 1 - Robert & Poignant

172 hydrolysis, oxidation and reduction

not been completely mapped out and, in particular, the use of other amino
acids such as proline, which are known to be particularly useful chiral cata-
lysts [29] , must be examined.

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19. Inspection of molecular model of oxazaborolidine 2a and 5a indicated that the
distance of hydrogen (C ortho ÿ H) to boron (N-BH 3 ) of 5a is closer than 2a.

B
B H
N
H
N B
B
2a 5a