| 摘要 |
A process is used for the preparation of 1,3,2-oxazaborolidine compounds. This process prepares compounds of formula (I) or (IA): in which: R1 is an alkyl or an aryl; and R2, R3, R4 and R5 are especially a hydrogen atom or an alkyl, wherein the following are reacted in two steps: a) a boric precursor compound with an acetal compound to give a boronate compound; and b) the boronate compound with an amino alcohol compound. This process avoids by-products and exhibits a very good stereospecificity.
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