Synthesis of 5,6-dihydro-2H-thiins and 2,3-dihydro-1,4-oxathiins based on 1-benzylsulfonyl-1,1-dihydropolyfluoroalkan-2-ones
作者:S.V Yemets、Yu.P Bandera、V.M Timoshenko、Yu.G Shermolvich
DOI:10.1016/s0022-1139(02)00061-1
日期:2002.6
1-benzylsulfonyl-1-thioxopolyfluoroalkan-2-ones. These compounds easily undergo the hetero Diels–Alder reaction with electron-rich 1,3-dienes as dienophiles and with electron-rich olefins as hetero-1,3-dienes. Polyfluoroalkyl substituted derivatives of six-membered sulfur-containing heterocycles, 5,6-dihydro-2H-thiins and 2,3-dihydro-1,4-oxathiins, are obtained as a result of these reactions.
1-苄基磺酰基-1,1-二氢聚氟烷基-2-酮与邻苯二甲酰亚胺基亚磺酰氯或琥珀酰亚胺基亚磺酰氯反应,在活性亚甲基上形成亚磺酰化产物,即1-苄基磺酰基-1-邻苯二甲酰亚胺基(琥珀酰亚胺基)硫代聚氟代烷二酮。后者的分解导致形成1-苄基磺酰基-1-硫代多氟烷基-2-酮。这些化合物容易与富电子的1,3-二烯作为亲二烯体和与富电子的烯烃作为杂1,3-二烯发生异Diels-Alder反应。作为这些反应的结果,获得了六元含硫杂环的多氟烷基取代的衍生物5,6-二氢-2H-thinin和2,3-二氢-1,4-氧杂丝氨酸。