A Convenient Method for the Synthesis of Diacyl Disulfides
摘要:
A simple and general method for the synthesis of diacyl disulfides is reported. Sulfur is allowed to react with sodium hydroxide to give sodium disulfide at 65 degrees C under PTC, which can react with acyl halides to afford diacyl disulfides in good to excellent isolated yields. The effects of solvents and phase transfer catalysts are discussed.
Aroyl disulfides as promoter-modifiers for copolymerization of butadiene and styrene
作者:Robert L. Frank、James R. Blegen、Archie Deutschman
DOI:10.1002/pol.1948.120030108
日期:1948.2
veratroyl, p-bromobenzoyl, p-phenylbenzoyl, p-benzoylbenzoyl, p-methylsulfonylbenzoyl, p(N,N-dimethylsulfonamido)-benzoyl and -naphthoyl disulfides are promoters of the emulsion copolymerization of butadiene and styrene, but exhibit little effect on the polymer properties. Furoyl, phenyl, p-chlorophenyl and p-bromophenyl disulfides are neither promoters nor modifiers.
PROCESS FOR PRODUCING POLYMER TERMINATED WITH OPTIONALLY PROTECTED FUNCTIONAL GROUP
申请人:KURARAY Co. LTD.
公开号:EP0704460A1
公开(公告)日:1996-04-03
A process for producing polymers having terminal functional group which may be protected, comprises polymerizing a radical-polymerizable monomer with a polymerization initiator comprising at least one member selected from the group (A) consisting of thio-S-carboxylic acids represented by the following general formula (1) and dithiocarboxylic acids represented by the following general formula (2) and at least one member selected from the group (B) consisting of polysulfides represented by the following general formula (3), polysulfides represented by the following general formula (4) and sulfoxides:
wherein R¹ represents a hydrocarbon group which may have a substituent including functional group;
wherein R² represents a hydrocarbon group which may have a substituent including functional group;
wherein R³ and R⁴ each represents a hydrocarbon group which may have a substituent including functional group and n is an integer of 2 or more; and
R⁵- (S)m- R⁶ (4)
wherein R⁵ and R⁶ each represents a hydrocarbon group having a functional group and m is an integer of 2 or more. This process can produce polymers with which functional groups have been introduced into one end or both ends thereof, irrespective of the rate of polymerization or the degree of polymerization of the polymer that forms.
A simple and general method for the synthesis of diacyl disulfides is reported. Sulfur is allowed to react with sodium hydroxide to give sodium disulfide at 65 degrees C under PTC, which can react with acyl halides to afford diacyl disulfides in good to excellent isolated yields. The effects of solvents and phase transfer catalysts are discussed.