Synthesis, physical characterisation and chemical properties of methylsulphur trifluoride, CH3SF3
摘要:
Methylsulphur trifluoride, CH3SF3, has been synthesised by the reaction between AgF2 and a solution of CH3SCl in CCl3F. It is a clear, viscous liquid which attacks glass, is hydrolysed rapidly, and decomposes at ambient temperatures to give CH2FSF3 and CH2FSSCH2F. The compound has been characterised by its H-1 and F-19 NMR and vibrational spectra, and a partial vibrational assignment is proposed. The chemistry of CH3SF3 is akin to that of SF4. Thus, it functions as a fluoride ion donor much more readily than as a fluoride ion acceptor. It reacts with Pyrex glass to give CH3S(O)F, is hydrolysed to CH3S(O)OH, and effects O-F exchange with acetone to yield 2,2-difluoropropane.
Dehydrogenative Cycloisomerization/Arylation Sequence of
<i>N</i>
‐Propargyl Carboxamides with Arenes by Iodine(III)‐Catalysis
作者:Yuki Umakoshi、Yusuke Takemoto、Akira Tsubouchi、Viktor V. Zhdankin、Akira Yoshimura、Akio Saito
DOI:10.1002/adsc.202200219
日期:2022.6.21
provides a facile and powerful approach to C−C bondformation between the generated heterocycles and unfunctionalized arenes. Here, we describe a hypervalent iodine(III)-catalyzed synthesis of oxazoles concomitant with the introduction of aryl groups into side chain from N-propargyl carboxamides and arenes, representing first C(sp3)−C(sp2) bondformation by the catalytic dehydrogenative cycloisomerization/arylation