3-меркаптопропионовая и 4-меркаптомасляная куплю

[Бухалыч]

Нужен сабж 100-200 мл каждой (можно и больше). Новосибирск.

[chemist]

3-меркаптопропионовая недорогая у господ капиталлистов, даже у Aldrich.

А вот 4-меркаптомасляная нестабильна, вот что про неё пишут в CCD:

Entry Name: 4-Mercaptobutanoic acid, 9CI
Chapman Hall Number: JJR22-S
CAS Registry Number: 13095-73-3

HSCH2CH2CH2COOH

Molecular Formula: C4H8O2S
Molecular Weight: M 120.172.
General Statement: Free acid spontaneously lactonises.
RTECS Accession Number: >>ET5100000.

Derivative: Et ester
Chapman Hall Number: HQG75-I
CAS Registry Number: 70124-54-8
Molecular Formula: C6H12O2S
Molecular Weight: M 148.226.
Physical Description: Liq..
Boiling Point: Bp 1.3 165 deg.

Derivative: S-Ph
Synonym(s): 4-(Phenylthio)butanoic acid
Chapman Hall Number: HQG76-J
Molecular Formula: C10H12O2S
Molecular Weight: M 196.270.
Physical Description: Cryst. (petrol).
Melting Point: Mp 68-69 deg.

Derivative: S-Ph, S,S-dioxide
Synonym(s): 4-(Phenylsulfonyl)butanoic acid, 9CI
Chapman Hall Number: HQF20-J
CAS Registry Number: 6178-52-5
Molecular Formula: C10H12O4S
Molecular Weight: M 228.268.
Use/Importance: Readily forms a synthetically useful dianion.
Physical Description: Cryst. (CHCl3).
Melting Point: Mp 90-91 deg.

References:
Reppe, W et al.,Annalen,1955, 596, 158 (synth)
Traynelis, VJ et al.,J.O.C.,1961, 26, 2728 (deriv, synth)
Kukalenko, SS, Zh. Org. Khim.,1970, 6, 680; J. Org. Chem. USSR (Engl. Transl.),682 (deriv, synth)
Danehy, JP et al.,J.O.C.,1971, 36, 2530 (synth)
Thompson, CM et al.,J.O.C.,1989, 54, 890 (deriv, synth, pmr, cmr, use)
Fieser and Fieser's Reagents for Organic Synthesis,Wiley, 1990, 15, 262 (use, S-Ph, dioxide)
[00037497-6]

М.б. еёйный эфир или лактон спасет отца русской демократии, его можно купить у тех же буржуев, вот его подногтная из того же источника:

Entry Name: Dihydro-2(3H)-thiophenone, 9CI
Synonym(s): 2-Thiolanone. 4-Mercaptobutanoic acid .gamma.-thiolactone. .gamma.-Thiobutyrolactone
Chapman Hall Number: CVN15-F
CAS Registry Number: 1003-10-7

Molecular Formula: C4H6OS
Molecular Weight: M 102.157.
Source/Synthesis: Component of roasted coffee beans.
Physical Description: Liq..
Density: d204 1.180.
Boiling Point: Bp 20 90-92 deg. Bp 1 45-46 deg.
Other Data: n20D 1.5230.
Hazard Toxicity: >>LD50 (mus, orl) 1860 mg/kg.
RTECS Accession Number: >>XN1930000.

Derivative: Oxime
Chapman Hall Number: CVN16-G
CAS Registry Number: 4781-84-4
Molecular Formula: C4H7NOS
Molecular Weight: M 117.171.
Physical Description: Cryst..
Melting Point: Mp 115-116 deg.

Derivative: Ethylene dithioketal
Synonym(s): 1,4,6-Trithiaspiro[4.4]nonane, 9CI
Chapman Hall Number: LFQ30-I
CAS Registry Number: 121921-84-4
Molecular Formula: C6H10S3
Molecular Weight: M 178.343.
Physical Description: Cryst. (pentane).
Melting Point: Mp 43-45 deg.
Boiling Point: Bp 0.25 90-91 deg.

References:
Aldrich Library of 13C and 1H FT NMR Spectra,1, 1127B (nmr)
Aldrich Library of FT-IR Spectra, 1st edn.,1, 699C (ir)
Aldrich Library of FT-IR Spectra: Vapor Phase,3, 752B (ir)
Aldrich Library of NMR Spectra,3, 73C (pmr)
Stevens, M et al.,J.O.C.,1954, 19, 1996 (synth, uv)
Kharasch, N et al.,J.O.C.,1963, 28, 1901 (synth)
Stoffelsma, J et al.,J. Agric. Food Chem.,1968, 16, 1000 (glc, ms)
Hawkins, RT, J. Het. Chem.,1974, 11, 291 (synth)
Fukui, K et al.,J. Phys. Chem.,1980, 84, 98 (uv)
Delaney, PA et al.,J.C.S. Perkin 1,1991, 285 (ethylenedithioketal)
Alonso, JL et al.,Z. Naturforsch., A,1992, 47, 588 (struct, microwave)
[00032698-5]

[Бухалыч]

Спасибо, chemist!
Теперь более-менее понятно, почему перегонка самодельной меркаптомасляной не увенчалась успехом
Меркаптопропионовую мы заказали, однко нас и буржуинов разделяют месяца, так что я бы приобрел, ежели у кого есть.