of N-(2-SF5-ethyl)amines is reported via the SN2 reaction between various amines and 2-(pentafluoro-λ6-sulfanyl)ethyl trifluoromethanesulfonate as the SF5-containing electrophile. A total of 14 examples of SF5-containing aliphatic amines were synthesized, with yields going from 19 to 92%. Moreover, the effect of the SF5 substituent on the basicity and the lipophilicity of the amine was evaluated, and
Calculated structures of thiopyrylium-S-fluoride and S-trifluoride and attempts of their preparation
作者:Helmut Poleschner、Konrad Seppelt
DOI:10.1016/s0022-1139(02)00284-1
日期:2003.3
Structures and energies of cyclo-C5H5SF and cyclo-C5H5SF3 have been calculated. In both cases the 2- and 4-CF-isomers are more stable than the SF and SF3 isomers. The fluxionalbehavior of the sulfur bonded fluorides has been calculated also. In cyclo-C5H5SF an ellipsoidal rotation of the sulfur bonded fluorine atom is observed with a barrier of a few kcal mol−1. In sulfur bonded cyclo-C5H5SF3 the
已经计算出环-C 5 H 5 SF和环-C 5 H 5 SF 3的结构和能量。在这两种情况下,2-和4-CF异构体均比SF和SF 3异构体稳定。还计算了硫键氟化物的通量行为。在环C 5 H 5 SF中,观察到硫键合的氟原子的椭圆形旋转,其势垒为几kcal mol -1。与以前的工作一致,在硫键合的环-C 5 H 5 SF 3中,预计(旋转)旋转会发生而没有明显的障碍。
Formation of α-SF<sub>5</sub>
-Enolate Enables Preparation of 3-SF<sub>5</sub>
-Quinolin-2-ones, 3-SF<sub>5</sub>
-Quinolines, and 3-SF<sub>5</sub>
-Pyridin-2-ones: Evaluation of their Physicochemical Properties
作者:Adrien Joliton、Jean-Marc Plancher、Erick M. Carreira
DOI:10.1002/anie.201510380
日期:2016.2.5
This study describes, for the first time, the generation of a SF5‐substituted ester enolate from benzyl SF5‐acetate under soft enolization conditions, which in turn participates in aldol addition reactions in high yield. The reaction was applied in the synthesis of 3‐SF5‐quinolin‐2‐ones, 3‐SF5‐quinolines, and 3‐SF5‐pyridin‐2‐ones, none of which have previously been reported. To provide guidelines for