Ethylene sulphide

The l l-adducts obtained from the ethylene phosphonothioites (38 R = Ph or Bu ) with diacetyl, benzylideneacetylacetone, and phen-anthraquinone readily eliminate ethylene sulphide to give the corresponding phosphonate or phosphinate esters. The benzylideneacetylacetone adduct of (38 R = Bu ) contained the two diastereoisomers (39) and (40) which, on elimination of ethylene sulphide at 100 °C, gave isomeric phosphinates. 

Reaction with Ethylene Sulphide and Ethylene Oxide... 

According to the patent literature 446,447), biguanide reacts additively with boiling ethylene sulphide (employed in two molar excess) to yield mercaptoethylbiguanide (CLXVIII X = S). 

Further derivatization of DTPA bis-anhydride has led to the introduction of ferric-selective moieties (20)116-1. Other derivatives of DTPA produced are DTPA - bis(-3-ami-do-4-thiol-benzotrifluoride), a chelating agent which can be monitored by 19F-NMR116, and a fluorescent DTPA derivative formed by reacting the bisanhydride with 7-amino-4-methyl coumarin116. Reaction of ethylene sulphide with HPDTA leads to the 0-2-ethanethiol derivative (21)116. ... 

Ethylene sulphide and propylene sulphide have been reported by Soga et ol. [249,250] to copolymerise with carbon disulphide in the presence of catalysts such as diethylzinc, diethylcadmium and mercury bis( -butanethiolatc), yielding poly(alkylene thioether-trithiocarbonate) copolymers (Table 9.4). The content of ethylene trithiocarbonate units in the ethylene sulphide/carbon disulphide copolymer obtained with the most efficient catalyst, mercury bis( -butanethiolate), was in the range 50-70 mol.-% [249]. 

Especially above room temperature many polymers degrade in an air atmosphere by oxidation that is not light-induced (heat ageing). A number of polymers already show a deterioration of the mechanical properties after heating for some days at about 100 °C and even at lower temperatures (e.g. polyethylene, polypropylene, poly(oxy methylene) and poly(ethylene sulphide)). 

SYNS AETHYLENSULFID (GERMAN) 2,3-DIHYDROTHIIRENE ETHYLENE EPISULHDE ETHYLENE EPISULPHIDE ETHYLENE SULPHIDE THIACY CLOPROPANE THIIRANE... 

The anionic polymerization of thiiranes appears to proceed very clearly and in a well defined manner. Living systems have been found and good kinetic measurements have been possible [36]. The base catalysed polymerization of ethylene sulphide (ES) was probably one of the earliest thiirane polymerizations noted. However, the studies have been hindered because the polymer formed is highly crystalline and insoluble. Homogeneous solution studies have not been possible. Propene sulphide (PS) on the other hand gives soluble amorphous polymer and has been amenable to careful study. Indeed the formation of amorphous polypropene sulphide is the major evidence that base catalysed polymerization is ionic and proceeds by the reactions indicated by the equations... 

Formation of the Oxazolidine and Thiazolidine Ring in C20 Diterpenoid Systems.—A convenient method for the construction of oxazolidine and thiazolidine rings from the imine-containing diterpenoids has been reported. " Treatment of the imine, e.g. lindheimerine (63), with ethylene oxide in glacial acetic acid or with excess neat ethylene sulphide gave the corresponding oxazolidine [e.g. ovatine (64)] and thiazolidine [e.g. (65)], respectively, in yields of 90—98%. 

Examples of previously described methods are the ring-opening of thiirans [ethylene sulphide with Pr"ONa and H2C=CHCH2C1 Pr"0(CH2CH2S) -CH2CH=CH2 (n = 1 or 2)], the use of a chlorosulphonium salt (RC02 Et3NH+... 

Photolysis of 5-ethylenic sulphides leads to tetrahydrothiophens or thiapyrans (Scheme 63). °° The mechanism of this reaction has been studied in some... 

NCN=C(SR)S (R = alkyl) react with chloroacetamide to give the amino-thiazoles (583). Irradiation of 2-phenyl-2-thiazoline (584) in acetonitrile leads to a mixture of the corresponding thiazole, benzonitrile, and ethylene sulphide. Heating the dithiobiuret Me2NCSNHCSNH2 with phenacyl bromide affords the 2,5 -bithiazole (585) in excellent yield. ... 

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