| 摘要 |
<p>A process for preparing a composition of formula (I) by reacting a composition of formula (IV) with a polyhydric alcohol of the formula HO-X-OH in the presence of an acid catalyst at an elevated temperature to form a ketal of formula (II) and reacting the ketal of formula (II) with a monohydric alcohol in the presence of an acid at an elevated temperature to form (I).</p> |
