摘要:
The first total synthesis of pravastatin (3) is described. The desymmetrization of 1-methyl-4-methylenecyclohexane (10) by an asymmetric ene reaction to form 11a provided the initial asymmetric framework. The remaining stereogenic centers were introduced sequentially by a series of diastereoselective processes which include the iodolactonization of 11a to 13. the Eschenmoser-Claisen rearrangement of 17 to 18, the stereoselective intramolecular ene reaction of 20 to 21. and the diastereoselective condensation of aldehyde 27 with diene 28.