and PhS− ions. Whereas 4a gave only SN2 products, 4b gave SN2 and E2C products typical of SN2/E2C competition. Among the salts 5a–c displacement of the benzylgroup was dominant (5a) or exclusive (5b, c), thus exhibiting the preferential displacement of a benzylgroup that has been fully documented in earlier studies of SN2 reactions. Qualitative comparison showed that 3a (methyl) reacted much faster
Enabling the Use of Alkyl Thianthrenium Salts in Cross‐Coupling Reactions by Copper Catalysis
作者:Cheng Chen、Minyan Wang、Hongjian Lu、Binlin Zhao、Zhuangzhi Shi
DOI:10.1002/anie.202109723
日期:2021.9.27
used groups in organic synthesis. Here, a a series of thianthreniumsalts have been synthesized that act as reliable alkylation reagents and readily engage in copper-catalyzed Sonogashira reactions to build C(sp3)−C(sp) bonds under mild photochemical conditions. Diverse alkyl thianthreniumsalts, including methyl and disubstituted thianthreniumsalts, are employed with great functional breadth, since
A range of d2-labeled alkanes can be synthesized via nickel-catalyzed hydrodeuterioalkylation of deuterated alkyl thianthrenium (TT) salts with unactivated alkenes. The deuterated alkyl reagents effectively integrate deuterium from D2O via pH-dependent hydrogenisotopeexchange (HIE). Our method enables high deuterium incorporation and precise control over insertion site, essential for drug synthesis
一系列 d2 标记的烷烃可以通过镍催化的氘代烷基噻啉鎓 (TT) 盐与未活化的烯烃的加氢氘烷基化来合成。氘化烷基试剂通过 pH 依赖性氢同位素交换 (HIE) 有效地整合 D 2 O 中的氘。我们的方法能够实现高氘掺入和对插入位点的精确控制,这对于药物合成至关重要。