作者:Arnaldo Alzérreca、Eliud Hernández、Edgar Mangual、José A. Prieto
DOI:10.1002/jhet.5570360236
日期:1999.3
The low temperature addition of dilithiomethylphenyl sulfone to 2,3-O-isopropylidene-D-erythronolactone, and to 5-O-(tert-butyldimethylsilyl)-2,3-O-isopropylidene-D-ribofuranolactone gives the lactols 2 and 3a, respectively. Dehydration of lactol 2 in the presence of boron trifluoride etherate produces tetrahydrofuranylidene sulfones 5 and 6 in good yields. The reaction of lactol 3a under the same
低温除了dilithiomethylphenyl砜2,3-的ö异亚丙基d-erythronolactone,以及5- ö - (叔丁基二甲基)-2,3- Ô异亚丙基d-ribofuranolactone给出了乳醇2和图3a,分别。在三氟化硼醚化物的存在下,乳糖醇2的脱水以良好的产率产生四氢呋喃基亚砜5和6。乳糖醇3a在相同反应条件下的反应通过竞争性分子内取代而形成1',5'-脱水衍生物7 。