79963-95-4Relevant articles and documents
Preparation of (perfluoroalkyl)alkane thiols via Zemplén deacylation of fluorous (perfluoroalkyl)alkyl thioacetates
Menczinger, Bálint,Nemes, Anikó,Szíjjártó, Csongor,Rábai, József
, p. 70 - 77 (2018/03/21)
Convenient and robust synthesis of (perfluoroalkyl)alkane thiols [(CnF2n+1(CH2)mSH); m/n = 3/4,6,8,10, 4a-d; m/n = 2/6, 8; m/n = 1/1,2,3,7,8H, 12a-e] was developed starting from commercially available fluorous alcohols (1a-d, 5, 9a-e). The intermediate (perfluoroalkyl)alkyl iodides and/or sulfonates were reacted with potassium thioacetate in DMF, and the resulting thioacetates were deacetylated by a Zemplén analogue reaction. The (perfluoroalkyl)alkane thiols were obtained in good overall yields and high purity.
Theory and example of a small-molecule motor
Mock, William L.,Ochwat, Krzysztof J.
, p. 175 - 182 (2007/10/03)
Conceptual principles for operation of a molecular motor stipulate that such a species must consist of an energy-consuming catalyst that exhibits within its mechanism temporal overlap of successive catalytic cycles, so as to induce irreversible intramolecular motion during operation. The exothermic hydration reaction of MeCOCH=C=NCMe3 brought about by catalyst HO2CCH2OCMe(CO2H)2 qualifies as such a process, in the form of serial conversion between canonical carboxylic anhydride structures within the catalyst. The steady-state kinetic behavior and inactivation by methanol demonstrate the operation of an appropriate repetitive catalytic loop in this case. Copyright
A NEW METHOD FOR RECOVERING WASTE ALKALINE PERFLUORO-n-BUTANESULFONATE
Conte, L.,Napoli, M.,Scipioni, A.,Guerrato, A.
, p. 277 - 283 (2007/10/02)
A new method for recovering perfluoro-n-butanesulfonic acid from its waste alkaline salts and re-converting it into the corresponding 2,2,2-trifluoroethyl ester alkylating agent is described.Alkaline perfluoro-n-butanesulfonate can be converted into the corresponding acid by treating it with gaseous HCl in methanol; perfluoro-n-butanesulfonic acid is then directly esterified by treatment with 2,2,2-trifluoro-ethanol in thionyl chloride.Easy procedures and high yields could make this method important for industial application, with possible economic and environmental benefits.
