A one-pot synthesis of sulfonamides from sulfones has been developed. Conversion of sulfones to the corresponding sulfinic acid salts is followed by oxidative-amination to give the sulfonamides.
Additives for lubricating oils and fuel oils, lubricating oil compositions, and fuel oil compositions
申请人:Shimizu Nobuaki
公开号:US20060148663A1
公开(公告)日:2006-07-06
Additives for lubricating oils and for fuel oils which comprise as the main component a disulfide represented by the following general formula (I) or (IV):
R
1
OOC-A
1
-S
x
-A
2
-COOR
2
(I)
(R
1
and R
2
each independently represent a hydrocarbyl group which has 1 to 30 carbon atoms and may have oxygen atom, sulfur atom or nitrogen atom, A
1
and A
2
each independently represent a group represented by CR
3
R
4
, R
3
and R
4
each independently representing hydrogen atom or a hydrocarbyl group having 1 to 20 carbon atoms, and x represents 2.)
R
1
OOC-A
3
-S
x
-A
4
-COOR
2
(IV)
(R
1
and R
2
are as defined above, A
3
and A
4
each independently represent a group represented by CR
5
R
6
—CR
7
R
8
, R
5
to R
8
each independently representing hydrogen atom or a hydrocarbyl group having 1 to 20 carbon atoms, and x represents 2.) The additives exhibit excellent functions as the extreme pressure additive and the antiwear agent and the suppressed corrosive property to nonferrous metals and are advantageously used as the sulfur-based extreme pressure additives for lubricating oils and fuel oils.
A class of 3,4-diaryl substituted thiophene, derivatives and analogs thereof, pharmaceutical compositions containing them and methods of using them to treat inflammation and inflammation-related disorders. Compounds of particular interest are defined by Formula I:
wherein Y is S; wherein X is one or two substituents selected from hydrido, halo, lower alkoxycarbonyl and carboxyl; wherein R2 and R3 are independently aryl or heteroaryl; and wherein R2 and R3 are optionally substituted with one or more radicals selected from sulfamyl, alkylsulfonyl, halo, lower alkoxy and lower alkyl; or a pharmaceutically-acceptable salt thereof.
A process for preparing thiodiglycolic acid comprises contacting bromoacetic acid, diglycolic acid or glycolic acid and hydrogen sulfide in the presence of aqueous hydrogen bromide.