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.
一种用于制备1,3,2-氧杂
硼杂
环丙烷化合物的过程。该过程制备具有
化学式(I)或(IA)的化合物:其中:R1是烷基或芳基;R2、R3、R4和R5尤其是氢原子或烷基,在两个步骤中反应如下:a) 用
硼前体化合物与
缩醛化合物反应得到
硼酸酯化合物;和b)
硼酸酯化合物与
氨基醇化合物反应。该过程避免了副产物的产生,并表现出非常良好的立体特异性。