Synthesis and reactivity of some thiochroman-3,4-diones.
作者:Christopher D Gabbutt、John D Hepworth、B.Mark Heron
DOI:10.1016/s0040-4020(01)85270-4
日期:1994.1
Thiochroman-3,4-diones, which result from the reaction of thiochroman-4-ones with isoamyl nitrite, form fused heterocycles on reaction with 1,2-diamines and with p-anisaldehyde and ammonium acetate. Cyclopenta-[c][1]benzothiopyran-2-one, formed on reaction with dibenzyl ketone, yields a dibenzo[bd]thiopyran after cycloaddition of DMAD. With methyl magnesium iodide, a mixture of thiochroman-3-and 4-ols
硫代苯并吡喃-4-酮与亚硝酸异戊酯的反应产生的硫代苯并吡喃-3,4-二酮在与1,2-二胺以及对-茴香醛和乙酸铵反应时形成稠合的杂环。与二苄基酮反应形成的环戊-[ c ] [1]苯并噻喃-2-酮,在DMAD环加成后生成二苯并[ bd ]噻喃。使用甲基碘化镁,形成硫代色烷-3-和4-醇的混合物,仅在4-醇选择性脱水后才将其分离。分离得到的4-亚甲基衍生物为杂Diels-Alder螺状加合物。