作者:James L. Bachman、P. Rogelio Escamilla、Alexander J. Boley、Cyprian I. Pavlich、Eric V. Anslyn
DOI:10.1021/acs.orglett.8b03661
日期:2019.1.4
A base-catalyzed direct oxidation of rhodamine, carborhodamine, and siliconrhodamine pyronines to the corresponding xanthones is studied. This methodology utilizes addition of water to split pyronines into xanthone and reduced xanthene, the latter of which is returned to pyronine by oxidation with iodine. The transformation is general, working on the three most recalcitrant versions of N,N,N′,N′-tetramethylpyronines
研究了若丹明,卡波丹明和硅罗丹明吡咯碱在碱催化下的直接氧化为相应的氧杂蒽。该方法利用加水将吡咯类分解为x吨酮和还原的x吨,后者通过碘氧化而还原为吡咯。该转化是一般的,以良好至优异的产率处理N,N,N ',N'- N'-四甲基吡喃酮的三个最顽强的版本。