Chiral 3-oxocycloalkanecarbonitriles were prepared by fractional crystallization and crystallization-induced diastereomer transformation (CIDT) of diastereomeric ketals with (1R,2R)-1,2-diphenylethane-1,2-diol. Investigation of the crystal structures by X-ray diffraction analysis revealed that the difference in hydrogen bonds caused the discrepancy of the solubilities between (R) and (S) diastereomers
手性 3-氧代环
烷烃腈是通过用 (1 R ,2 R )-1,2-diphenylethane-1,2-diol 对非对映
缩酮进行分级结晶和结晶诱导的非对映异构体转化 (CIDT) 制备的。通过 X 射线衍射分析对晶体结构的研究表明,氢键的差异导致 ( R ) 和 ( S ) 非对映异构体之间溶解度的差异。此外,CIDT 以高收率(95% 收率)和高非对映选择性(97% de)实现了( R )-非对映异构体,这是通过与(1)形成非对映
缩酮生成中性化合物 CIDT 的第一个例子R ,2 R)-1,2-二苯基
乙烷-1,2
-二醇。