| 摘要 |
<p>A method of the formula (I) compounds preparation, wherein R1 and R2 represent mutually independent from one another a hydrogen atom or an alkyl group with from 1 to 8 carbon atoms; m is the number 0, 1, 2 or 3; n is the number 1 or 2 and A is OR3 providing that n is the number 1, wherein R3 is the alkyl group with from 1 to 20 carbon atoms or a cycloalkyl group with from 5 to 12 carbon atoms; A represents the group of -O-CxH2x-O- formula or -O-(CH2CH2O)aCH2CH2-O- formula providing that n is the number 2, wherein x is the number from 2 to 8 and A is the number from 1 to 12, wherein a compound of the formula (II) in which R1, R2 and m have the said meaning- reacts with the formula A -(-H)n compound, wherein A has the said meaning. The reaction is commenced in the presence of aluminium trialkoxide or aluminium phenoxide as a catalyst.</p> |
