+++синтез и физико-химические характеристики

[klamm]

Друзья, помогите, пожалуйста, разыскать зверя:
3-(2-mercaptoethylsulfanyl)propionic acid

Код: Выделить всё

OC(=O)CCSCCS

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[suprachemister]

Experimental Properties: Thermal
Top Thermal Properties Value Condition Note
Boiling Point 142-143 °C Press: 2 Torr (1) CAS

(1) Gribbins, Myers F.; US 2416052 1947 CAPLUS


References
1. Production of sulfide group-containing mercaptocarboxylic acid and ester as polymerization chain-transfer agent
By Ishikawa, Ryuichi
From Eur. Pat. Appl. (1998), EP 844238 A1 19980527. Language: English, Database: CAPLUS
To prevent the formation of harmful halogen-contg. waste and to improve the productivity of a sulfide group-contg. mercarptocarboxylic acid ester, the title compd. HS(CHR1CHR2S)nCH2CHR3CO2H (R1-3 = H, or lower alkyl, n = 1-5) is made by adding 1 of the thiol groups of a dithiol compd. to an acrylic acid ester deriv. Thus, Me acrylate was added dropwise over 1.5 h to a Me2CO soln. of ethane-1,2-dithiol and Amberlist IRA 94S catalyst at 70-72° to give ester product in 88.9% yield.

2. Stabilization of soaps with S-substituted β-mercaptopropionic acids
By Gribbins, Myers F.
No Corporate Source data available (1947), US 2416052 19470218. Language: Unavailable, Database: CAPLUS
Soaps are stabilized against rancidity and discoloration by the incorporation of 0.005-5% of a compd. of the general structure, XSCH2CH2CO2R, in which R is H or an esterifying group and X is a univalent hydrocarbon or substituted hydrocarbon radical. The compds. are prepd. by the addn. of mercaptans or other compds. contg. the SH group to CH2:CHCN followed by acid hydrolysis of the resulting nitrile. For example, EtSH 62 is treated with CH2:CHCN 53 in the presence of piperidine 1 part as a catalyst. The reaction is exothermic, and cooling is necessary. After 2 hrs. the reaction mixt. is di...

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suprachemister, спасибо!