Electrophile-mediated cyclizations of 6-O-benzyl-1,2-di- deoxy-3,4-O-isopropylidene-d-ribo-hex-1-enitol to derivatives of 2,5-anhydro-6-O-benzyl-3,4-O-isopropylidene-d-altro-hexitol
作者:Fillmore Freeman、Kirk D. Robarge
DOI:10.1016/0008-6215(85)85151-x
日期:1985.3
mercuric acetate, mercuric trifluoroacetate, phenylselenyl chloride)-mediated cyclization of 6- O -benzyl-1,2-dideoxy-3,4- O - isopropylidene- d - ribo -hex-1-enitol ( 2 ) led exclusively to 1-substituted derivatives of 2,5-anhydro-6- O -benzyl-3,4- O -isopropylidene- d - altro -hexitol ( 3 ). The synthesis of alkene 2 , together with mechanistic and stereochemical aspects of its cyclization to derivatives
摘要亲电试剂(溴,碘,乙酸汞,三氟乙酸汞,苯基硒基氯)介导的6-O-苄基-1,2-二脱氧-3,4- O-异亚丙基-d-核糖-己基-1-烯醇的环化( 2)仅导致2,5-脱水-6-O-苄基-3,4-O-异亚丙基-d-α-己糖醇的1-取代的衍生物(3)。讨论了烯烃2的合成及其环化成己糖醇3衍生物的机理和立体化学方面。