Synthesis of Isoflavones from 2′-Hydroxychalcones Using Poly[4-(diacetoxy)iodo]styrene or Related Hypervalent Iodine Reagent
作者:Yasuhiko Kawamura、Masashi Maruyama、Takanori Tokuoka、Masao Tsukayama
DOI:10.1055/s-2002-35617
日期:——
Isoflavones are synthesized in an one-pot reaction by treating the hypervalent iodine(III) reagent, [hydroxy(tosyloxy)iodo]benzene (HTIB, Koser's reagent) with 2'-benzoyloxychalcones in McOH. A combined use of (diacetoxyiodo)benzene (DIB)/p-toluenesulfonic acid (TsOH) is also effective for the same purpose. As an extension of these monomeric reagents, polymer-supported DIB PSDIB, poly[4-(diacetoxy)iodo]styrene}
通过在 McOH 中用 2'-苯甲酰氧基查耳酮处理高价碘 (III) 试剂 [羟基(甲苯磺酰氧基)碘] 苯(HTIB,Koser 试剂),在一锅法反应中合成异黄酮。(二乙酰氧基碘)苯(DIB)/对甲苯磺酸(TsOH)的组合使用对于相同的目的也是有效的。作为这些单体试剂的扩展,聚合物负载的 DIB PSDIB,聚 [4-(二乙酰氧基)碘]苯乙烯} 与 TsOH 也很有效。后者的优点是易于从反应混合物中分离异黄酮,不会释放 Phi,并且可以重复使用试剂。