Phosphorus ylide chemistry investigated for dihydrotachysterol2 metabolite side-chain synthesis the Wittig approach
作者:Jaap C. Hanekamp、Rob Boer Rookhuisen、Hendrik J.T. Bos、Lambert Brandsma
DOI:10.1016/s0040-4020(01)90124-3
日期:1992.1
the γ-oxido ylide of R-(3-hydroxy-2,3-dimethylbutyl)triphenylphosphonium iodide 4, to be used in the 25-hydroxylated DHT2 side-chain synthesis, was studied. The synthesis of the chiral phosphonium salt 4 was done in an overall yield of 73%. Condensation of the ylide with benzaldehyde afforded the olefin 11 in a 70% yield; no isomer was detected. Furthermore, some other useful phosphonium salts were
研究了用于25-羟基化DHT 2侧链合成的R-(3-羟基-2,3-二甲基丁基)三苯基碘化4 4的γ-氧化内酯的行为。手性phospho盐4的合成以73%的总产率进行。内鎓盐与苯甲醛的缩合得到烯烃11,产率为70%。未检测到异构体。此外,合成了一些其他有用的phospho盐。