A short asymmetric synthesis of (1R,5S,6S)-6-(2,2-dimethylpropanamido)spiro[4.4]nonan-1-ol 7 is described along with its application as a chiral auxiliary in various Diels–Alder reactions. The enantioselectivity of the Diels–Alder adducts ranged from 86–98% ee. The Diels–Alder adducts were easily removed from the chiral auxiliary and the latter was recyclized. The absolute and relative stereochemistry of 7 was determined from an X-ray crystal structure of the p-bromobenzoate derivative of 7.

中文翻译：

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Diels-Alder反应中手性助剂（1 R，5 S，6 S）-6-（2,2-二甲基丙酰胺基）螺[4.4]壬南-1-醇的合成与应用

（1 R，5 S，6 S）-6-（2,2-二甲基丙酰胺基）spiro [4.4] nonan-1-ol 7的短时不对称合成及其在各种Diels–Alder中作为手性助剂的应用反应。Diels–Alder加合物的对映选择性为ee的86–98％。狄尔斯-阿尔德加合物很容易从手性助剂中除去，后者被回收利用。的绝对和相对立体化学7从的X射线晶体结构确定p的-bromobenzoate衍生物7。