New synthetic route to modafinil drug including desulfobenzhydrylation of sodium carbamoylmethyl thiosulfate: experimental and quantum chemical studies
An efficient, one-pot synthesis of N-isatinylmethylthioacetic acid and its derivatives as potential anticancer agents
作者:Lev Yu. Ukhin、Arina R. Akopova、Anatolii S. Morkovnik、Kirill Yu. Suponitzky、Evgenii N. Shepelenko、Alexander V. Bicherov、Leonid D. Popov
DOI:10.1016/j.tetlet.2014.10.036
日期:2014.11
A convenient, one-pot synthesis of N-isatinylmethylthioacetic acid and several of its derivatives, as potential anticancer agents, by reactions of N-(hydroxymethyl)isatins with Bunte salts in TFA is described. The reactions involve attack of these salts on the S(II) atom by C-electrophilic species generated from hydroxy derivatives.
Out-smarting smart drug modafinil through flow chemistry
作者:Diana V. Silva-Brenes、Noémie Emmanuel、Vilmalí López Mejías、Jorge Duconge、Cornelis Vlaar、Torsten Stelzer、Jean-Christophe M. Monbaliu
DOI:10.1039/d1gc04666g
日期:——
amphetamines). Since the original report of its synthesis in 1976, nearly 20 manuscripts and patents have been published that propose alternative synthetic routes that limit the formation of problematic impurities, reduce the number of steps, or improve the green metrics of the process. Herein we show how the synthesis of modafinil can be improved in a continuous flow setup to deliver modafinil in 77% yield
A convenient method for the preparation of functionalized derivatives of isobenzofuran-1(3H)-ones and isoindol-1(3H)-ones by reactions of their carbocations with Bunte salts is described. The reactions proceed by means of electrophilic attack on the S(II)-atom of the Bunte salts. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of 6’ H-spiro(indene-2,2’ -[1,3]oxathiane)-1,3,5’ -triones
作者:Lev Yu. Ukhin、Lyudmila V. Belousova、Evgenii N. Shepelenko、Anatolii S. Morkovnik
DOI:10.1016/j.mencom.2013.11.017
日期:2013.11
Reaction of ninhydrin with a-mercapto carboxylic acids or the corresponding Bunte salts affords 6'H-spiro(indene-2,2'-[1,3]oxathiane)-1,3,5'-triones.
New synthetic route to modafinil drug including desulfobenzhydrylation of sodium carbamoylmethyl thiosulfate: experimental and quantum chemical studies
作者:A. V. Bicherov、A. R. Akopova、V. I. Spiglazov、A. S. Morkovnik
DOI:10.1007/s11172-010-0049-8
日期:2010.1
A new synthetic route to 2-benzhydrylsulfinylacetamide (1), a nootropic drug modafinil, is described. The synthesis includes the alkylation of sodium thiosulfate with chloroacetamide to sodium carbamoylmethyl thiosulfate, the desulfobenzhydrylation of the latter by benzhydrol in formic acid to form benzhydrylthioacetamide (3a), and the further oxidation of this thioamide with hydrogen peroxide. According to B3LYP/6-31G** DFT calculations, the key step of the synthesis, namely, desulfobenzhydrylation of salt 6a, occurs only insignificantly due to the energetically unfavorable direct attack of this salt by benzhydryl formate; the reaction mainly involves the attack by the benzhydrilium carbocation Ph2CH+. The oxidation of sulfide 3a to sulfinylacetamide 1 is efficiently catalyzed by side proton-donor molecules (constituents of the transition states of the reaction). The oxidant can be the anionic form of the reactant (HO2 - ion), which reacts with sulfide 3a via the unusual noncatalytic mechanism. At the step of transition state formation, this mechanism resembles the SN 2 substitution.