Carbon-13 NMR spectra of some 2- ethylthio-4′-substituted acetophenones and their mono- and di-oxygenated derivatives
作者:Paulo Roberto Olivato、Élida Bonfada、Roberto Rittner
DOI:10.1002/mrc.1260300116
日期:1992.1
The 13C NMR signals for some 2‐ethylthio‐, 2‐ethylsulphinyl‐ and 2‐ethylsulphonyl‐4′‐substituted acetophenones were assigned. The carbonyl carbons exhibit a progressive upfield shift on going from the ketosulphides to the ketosulphoxides and to the ketosulphones. The α‐methylene carbons fro the three classes of compounds are shielded by almost the same amount in relation to the corresponding calculated
指定了一些 2-乙硫基-、2-乙基亚磺酰基-和 2-乙基磺酰基-4'-取代的苯乙酮的 13C NMR 信号。羰基碳在从酮硫化物到酮亚砜和酮砜的过程中表现出渐进的高场转移。与相应的计算值相比,三类化合物的 α-亚甲基碳被屏蔽的量几乎相同。芳环碳的化学位移与使用取代基化学位移计算的那些非常一致。