Smiles-type free radical rearrangement of aromatic sulfonates and sulfonamides: syntheses of arylethanols and arylethylamines
作者:Masaru Tada、Hiroyasu Shijima、Masaharu Nakamura
DOI:10.1039/b303728b
日期:——
Smiles-type free radical rearrangements of arenesulfonates and arenesulfonamides are exploited for synthetic purposes. 4-Substituted benzenesulfonates cause Smiles-type rearrangement only when substituted by an electron withdrawing group. Therefore, ipso-attack by an alkyl radical on arenesulfonates takes place in an electrophilic manner. Arenesulfonamides rearrange only when the amide nitrogen is
芳烃磺酸盐和芳烃磺酰胺的微笑型自由基重排用于合成目的。4-取代的苯磺酸盐仅在被吸电子基团取代时才引起Smiles型重排。因此,芳烷基磺酸盐上的烷基自由基引起的ipso攻击以亲电子方式发生。由于该基团的吸电子性,芳烃磺酰胺仅在酰胺氮被烷氧基羰基取代时才重排。萘,喹啉和噻吩的磺酸盐和N-乙氧基羰基磺酰胺衍生物引起更多的重排并显示出合成效用。通过Smiles型重排以中等产率合成芳族氨基酸类似物。