25-hydroxydihydrotachysterol2 an innovative synthesis of a key metabolite of dihydrotachysterol2
                                
                                    
                                        作者:Jaap C. Hanekamp、Rob Boer Rookhuizen、Hendrik J.T. Bos、Lambert Brandsma                                    
                                    
                                        DOI:10.1016/s0040-4020(01)85618-0
                                    
                                    
                                        日期:1992.1
                                    
                                    A new synthesis of 25-hydroxydihydrotachysterol2 is described The hydroxylated side-chain is constructed stereoselectively using a chiral Wittig reagent. The A-ring synthon is introduced utilising the Wittig-Horner method as developed by Lythgoe et al.  The preparation of the metabolite is carried out in 18 steps.