Synthesis and applications of (1 R ,5 S ,6 S )-6-(2,2-dimethylpropanamido)spiro[4.4]nonan-1-ol as a chiral auxiliary in Diels–Alder reactions
作者:Michael J. Burke、Murray M. Allan、Masood Parvez、Brian A. Keay
DOI:10.1016/s0957-4166(00)00242-1
日期:2000.7
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
(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。