Thiol-yne reaction
In organic chemistry, the thiol-yne reaction (also known as alkyne hydrothiolation) is an organic reaction between a thiol (−SH) and an alkyne (−C≡CH). The reaction product is an alkenyl sulfide (−CH=CH−S−).[1][2]
The reaction was first reported in 1949 with thioacetic acid as reagent[3][4] and rediscovered in 2009.[5] It is used in click chemistry[6][7][8] and in polymerization, especially with dendrimers.
Thiol-yne reaction |
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This addition reaction is typically facilitated by a radical initiator or UV irradiation and proceeds through a sulfanyl radical species. With monoaddition a mixture of (E/Z)-alkenes form. The mode of addition is anti-Markovnikov. The radical intermediate can engage in secondary reactions such as cyclisation.[9][10] With diaddition the 1,2-disulfide or the 1,1- dithioacetal forms. Reported catalysts for radical additions are triethylborane,[11] indium(III) bromide[12] and AIBN.[13] The reaction is also reported to be catalysed by cationic rhodium and iridium complexes,[14] by thorium and uranium complexes,[15] by rhodium complexes,[16][17][18] by caesium carbonate[19] and by gold.[20]
Ichinose et al. thiol-yne reaction 1987[11] |
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Diphenyl disulfide reacts with alkynes to a 1,2-bis(phenylthio)ethylene.[21] Reported alkynes are ynamides.[22] A photoredox thiol-yne reaction has been reported.[23]
Polymer chemistry
[edit]In polymer chemistry, systems have been described based on addition polymerization with 1,4-benzenedithiol and 1,4-diethynylbenzene,[24][25] in the synthesis of other addition polymer systems[26] in the synthesis of dendrimers,[27][28][29][30] in star polymers,[31][32][33][34] in graft polymerization,[35] block copolymers,[36] and in polymer networks.[5][37] Another reported application is the synthesis of macrocycles via dithiol coupling.[38]
See also
[edit]References
[edit]- ^ March, Jerry (1985). Advanced Organic Chemistry: Reactions, Mechanisms, and Structure (3rd ed.). New York: Wiley. ISBN 9780471854722. OCLC 642506595.
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- ^ Bader, H.; Cross, L. C.; Heilbron, Ian; Jones, E. R. H. (1949). "132. Researches on acetylenic compounds. Part XVIII. The addition of thiolacetic acid to acetylenic hydrocarbons. The conversion of monosubstituted acetylenes into aldehydes and 1 : 2-dithiols". Journal of the Chemical Society (Resumed): 619. doi:10.1039/JR9490000619.
- ^ Bader, Henry (1956). "23. The addition of thiolacetic acid to ethynylcarbinols and the conversion of the adducts into aldols and ??-unsaturated aldehydes". Journal of the Chemical Society (Resumed): 116–121. doi:10.1039/JR9560000116.
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- ^ Lowe, Andrew B. (October 2014). "Thiol-yne 'click'/coupling chemistry and recent applications in polymer and materials synthesis and modification". Polymer. 55 (22): 5517–5549. doi:10.1016/j.polymer.2014.08.015.
- ^ Yao, BiCheng; Sun, JingZhi; Qin, AnJun; Tang, Ben Zhong (11 June 2013). "Thiol-yne click polymerization". Chinese Science Bulletin. 58 (22): 2711–2718. Bibcode:2013ChSBu..58.2711Y. doi:10.1007/s11434-013-5892-1.
- ^ Montevecchi, P; Navacchia, M (1998). "Sulfanyl radical mediated cyclization of aminyl radicals". Tetrahedron Letters. 39 (49): 9077. doi:10.1016/S0040-4039(98)01998-4.
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- ^ a b Ichinose, Yoshifumi; Wakamatsu, Kuni; Nozaki, Kyoko; Birbaum, Jean-Luc; Oshima, Koichiro; Utimoto, Kiitiro (1987). "Et3B induced radical addition of thiols to acetylenes". Chemistry Letters. 16 (8): 1647–1650. doi:10.1246/cl.1987.1647.
- ^ Yadav, J. S.; Reddy, B. V. Subba; Raju, A.; Ravindar, K.; Baishya, Gakul (2007). "Hydrothiolation of Unactivated Alkynes Catalyzed by Indium(III) Bromide". Chemistry Letters. 36 (12): 1474. doi:10.1246/cl.2007.1474.
- ^ Benati, Luisa; Capella, Laura; Montevecchi, Pier Carlo; Spagnolo, Piero (1995). "Free-Radical Addition of Heteroarenethiols and Heteroarylmethanethiols to Hexyne and Phenylacetylene. Chemical Behavior of the Transient .beta.-Sulfanylvinyl Radicals". The Journal of Organic Chemistry. 60 (24): 7941. doi:10.1021/jo00129a039.
- ^ Field, Leslie D.; Messerle, Barbara A.; Vuong, Khuong Q.; Turner, Peter (2009). "Rhodium(I) and iridium(I) complexes containing bidentate phosphine-imidazolyl donor ligands as catalysts for the hydroamination and hydrothiolation of alkynes". Dalton Transactions (18): 3599–614. doi:10.1039/b821188d. PMID 19381423.
- ^ Weiss, Charles J.; Wobser, Stephen D.; Marks, Tobin J. (2009). "Organoactinide-Mediated Hydrothiolation of Terminal Alkynes with Aliphatic, Aromatic, and Benzylic Thiols". Journal of the American Chemical Society. 131 (6): 2062–3. doi:10.1021/ja808764q. PMID 19170549.
- ^ Yang, Jun; Sabarre, Anthony; Fraser, Lauren R.; Patrick, Brian O.; Love, Jennifer A. (2009). "Synthesis of 1,1-Disubstituted Alkyl Vinyl Sulfides via Rhodium-Catalyzed Alkyne Hydrothiolation: Scope and Limitations". The Journal of Organic Chemistry. 74 (1): 182–7. doi:10.1021/jo801644s. hdl:2429/5534. PMID 19053611.
- ^ Sabarre, Anthony; Love, Jennifer (2008). "Synthesis of 1,1-Disubstituted Olefins via Catalytic Alkyne Hydrothiolation/Kumada Cross-Coupling". Organic Letters. 10 (18): 3941–4. doi:10.1021/ol8012843. PMID 18702501.
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- ^ Kondoh, Azusa; Takami, Kazuaki; Yorimitsu, Hideki; Oshima, Koichiro (2005). "Stereoselective Hydrothiolation of Alkynes Catalyzed by Cesium Base: Facile Access to (Z)-1-Alkenyl Sulfides". The Journal of Organic Chemistry. 70 (16): 6468–73. doi:10.1021/jo050931z. PMID 16050711.
- ^ Corma, Avelino; González-Arellano, Camino; Iglesias, Marta; Sánchez, Félix (2010). "Efficient synthesis of vinyl and alkyl sulfides via hydrothiolation of alkynes and electron-deficient olefins using soluble and heterogenized gold complexes catalysts". Applied Catalysis A: General. 375: 49–54. doi:10.1016/j.apcata.2009.12.016.
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- ^ Sato, Akinori; Yorimitsu, Hideki; Oshima, Koichiro (2010). "Radical Additions of Arenethiols to Ynamides for the Selective Synthesis of N-[(Z)-2-(Arylsulfanyl)-1-alkenyl]amides". Bulletin of the Korean Chemical Society. 31 (3): 570. doi:10.5012/bkcs.2010.31.03.570.
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