Visible-light-enabled spirocyclization of alkynes leading to 3-sulfonyl and 3-sulfenyl azaspiro[4,5]trienones
作者:Wei Wei、Huanhuan Cui、Daoshan Yang、Huilan Yue、Chenglong He、Yulong Zhang、Hua Wang
DOI:10.1039/c7gc02330h
日期:——
A visible-light-induced strategy has been established for the synthesis of 3-sulfonyl and 3-sulfenyl azaspiro[4,5]trienones at room temperature in air.
已在室温下空气中合成3-磺酰基和3-磺基氮杂螺[4,5]三烯酮的可见光诱导策略。
METHOD FOR PREPARING A SULFONIMIDE COMPOUND AND SALTS THEREOF
申请人:RHODIA OPERATIONS
公开号:US20150203449A1
公开(公告)日:2015-07-23
The present invention relates to a method for preparing an aqueous sulfonimide compound of the formula (Rf
1
—SO
2
) (Rf
2
—SO
2
)NH, wherein Rf
1
et Rf
2
are independently selected from the group comprising: a fluorine atom and groups having 1 to 10 carbon atoms selected from the perfluoroalkyl, fluoroalkyl, fluoroalkenyl and fluoroallyl groups, from a mixture M1 including (Rf
1
—SO
2
)(Rf
2
—SO
2
)NH, Rf
1
SO
2
H and/or Rf
2
SO
2
H, Rf
1
SO
2
NH
2
and/or Rf
2
SO
2
NH
2
, characterized in that said method includes an oxidation step of said mixture M1 using an oxidizing agent in order to obtain a mixture M2 including (Rf
1
—SO
2
)(Rf
2
—SO
2
)NH, Rf
1
SO
3
H and/or Rf
2
SO
3
H, and Rf
1
SO
2
NH
2
and/or Rf
2
SO
2
NH
2
.
A reciprocal-activation strategy for allylic sulfination with unactivated allylicalcohols was developed. In this reaction, the hydrogen bond interaction between allylicalcohols and sulfinic acids allowed for reciprocal activation, which enabled a dehydrative cross-coupling process to occur under mild reaction conditions. This reaction worked in an environmentally friendly manner, yielding water as
METHOD FOR PREPARING TRIFLUOROMETHANESULPHINIC ACID
申请人:Schanen Vincent
公开号:US20120197039A1
公开(公告)日:2012-08-02
The present invention relates to a method for preparing a highly pure trifluoromethanesulphinic acid. The method of the invention for preparing a highly pure trifluoromethanesulphinic acid, starting from an aqueous mixture comprising a trifluoromethanesulphinic acid salt, a trifluoroacetic acid salt and saline impurities resulting from the method for preparing same, is characterized in that said mixture is subjected to the following operations:- acidification such that the trifluoroacetic acid salt and the triflinic acid salt are released in an acid form,- separation of the trifluoroacetic acid and trifluoromethanesulphinic acid by distillation enabling the trifluoroacetic acid to be recovered at the top of the distillation and the trifluoromethanesulphinic acid to be recovered at the bottom of the distillation,- separation by distillation of the trifluoromethanesulphinic acid present in the distillation residue previously obtained.