摘要:
                                An improved process of the novel HMG CoA reductase inhibitor SIPI-4884 has been developed for early preclinical pharmacology and safety studies, and it was made up with an efficient nine-step and scalable process. Significant improvements in the nucleophilic substitution, reduction, Wittig-Horner reaction, and preparation of calcium salt were demonstrated. The overall yield was improved to 17.2%.