Synthesis of methyl 4,5-dideoxy-D,L-hex-4-enos-2-ulopyranosid-3-ulose ethylene acetal, derivative of the first natural sugar with dihydropyranone moiety, from 5-acetoxymethylfurfural is described. It was shown that 1,3-transposition of the allylic alcohol in the dihydropyran ring, a key step of the synthesis, can be carried out via an intermediate allylic selenoxide with excellent regio- and stereoselectivity.
本文介绍了一种从5-乙酰氧甲基糠醛合成甲基4,5-二脱氧-D,L-己-4-烯醛-2-乌洛吡喃-3-乌洛糖乙烯缩醛的方法,该化合物是第一种带有二氢吡喃基团的天然糖衍生物。结果表明,通过中间体烯基硒氧化物,可以实现二氢吡喃环中烯丙醇的1,3-转位,这是合成的关键步骤,具有优异的区域和立体选择性。