Rhodium-Catalyzed<i>N</i>-<i>tert</i>-Butoxycarbonyl (Boc) Amination by Directed CH Bond Activation
作者:Julian Wippich、Nadina Truchan、Thorsten Bach
DOI:10.1002/adsc.201600410
日期:2016.6.30
the indoloquinoline alkaloids quindoline and cryptolepine. The facile removal of the Boc protecting group was the key to the success of the syntheses. The scope of the reaction was extended to a C(sp3)H bond amination and to the amination of 2‐phenyloxazoline. For the amination of 2‐pyridin‐2‐ylbenzene a kinetic deuterium isotope effect of 2.0 was determined.
ñ -叔丁氧羰基叠氮化物(BocN 3)被证明是用于定向引进一种高效和经济的来源Ñ -Boc保护的氨基转化成噻吩并苯核。2-吡啶-2-基噻吩(10个实例)的胺化产率为52–88%。对于各种苯的胺化(10个实例),记录的收率在54%至99%之间,而带有吸电子基团的底物的反应性得到了改善。该反应被用于吲哚喹啉碱生物碱喹多啉和隐肾上腺素的短总合成。Boc保护基的轻松去除是合成成功的关键。反应范围扩大到C(sp 3)H键胺化和2-苯基恶唑啉的胺化。对于2-吡啶-2-基苯胺的胺化,动力学氘同位素效应确定为2.0。