15536-71-7Relevant articles and documents
Exploration of trans-2-(azaarylsulfanyl)-cyclohexanols as potential pH-triggered conformational switches
Ruyonga, Mulinde R.,Mendoza, Oscar,Browne, Michael,Samoshin, Vyacheslav V.
, (2020)
A series of trans-2-(azaarylsulfanyl)-cyclohexanols, structurally similar to previously studied trans-2-aminocylohexanols, have been synthesized and explored as conformational pH triggers. 1H NMR spectroscopy was used to estimate the position of the chair-chair conformational equilibrium and its acid-induced shift towards the conformer with the azaarylsulfanyl and hydroxy groups in equatorial positions due to an intramolecular hydrogen bond and electrostatic interactions. Such acid-induced transition may be used to control the geometry-dependent molecular properties. The 1H NMR titration curves were used for estimation of the pKa values of protonated compounds that varied from 2.8 to 4.3 (in d4-methanol) depending on the structure of the azaarylsulfanyl group.
Convenient synthesis of 1,3-dithiolane-2-thiones: Cyclic trithiocarbonates as conformational locks
Dotsenko, Irina A.,Zhao, Qinliang,Franz, Andreas H.,Batoon, Patrick,Samoshina, Nataliya M.,Samoshin, Vyacheslav V.
, p. 16 - 41 (2014/07/07)
A series of novel 1,3-dithiolane-2-thiones, or cyclic trithiocarbonates, has been prepared by a new simple procedure: a treatment of the corresponding epoxides with the commercially available potassium ethyl xanthogenate, KSC(S)OEt. The stereochemistry of the products was determined by 1H NMR and in some cases by single-crystal X-ray data. Cyclohexane-based 1,3- dithiolane-2-thiones revealed a trans-fusion of the carbo- and hetero-cycles. The products obtained from the mono-substituted cyclohexene oxides demonstrated an axial position of the substituents. Thus the epoxide transformation into trithiocarbonate can be used as a method for locking cyclic compounds in unstable conformations.ARKAT-USA, Inc.