2,3-O-异亚丙基-D-核糖酸-1,4-内酯,  2,3-O-Isopropylidene-D-ribonic acid-1,4-lactone

2,3-O-Isopropylidene-D-ribonic acid-1,4-lactone is an organic compound that belongs to the class of lactones. It is a chiral molecule with two asymmetric carbons and four stereogenic atoms. This compound can be used for the synthesis of optically active compounds. It is also a precursor for the synthesis of morpholines and phosphonates. 2,3-O-Isopropylidene-D-ribonic acid-1,4-lactone can be synthesized by reacting an enolate with an aldehyde in the presence of a base and acid catalyst. The acid catalyst causes elimination of water from the enolate to produce the desired product.