cas 22068-62-8, 4-(1,3-DITHIOLAN-2-YL)-2-METHOXYPHENOL

Articles about 22068-62-8Total 11 be found

Solid-supported odorless reagents for the dithioacetalization of aldehydes and ketones
A solid supported, odorless reagent for the dithioacetalization of aldehydes and ketones has been developed. The new reagent provides the dimercaptoalkane equivalent in combination with stoichiometric amounts of immobilized acid and enables the formation of dithianes and dithiolanes from aldehydes without any additives in good to very good yields with high purities. The reaction is chemoselective for aldehydes, but ketones can be reacted to the corresponding dithioketals if an additional Lewis acid such as BF3is added.
Jung,Gr?ssle,Lütjohann,Br?se
p. 1036 - 1039
(2014)
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PhIO-Mediated oxidative dethioacetalization/dethioketalization under water-free conditions
Treatment of thioacetals and thioketals with iodosobenzene in anhydrous DCM conveniently afforded the corresponding carbonyl compounds in high yields under water-free conditions. The mechanistic studies indicate that this dethioacetalization/dethioketalization process does not need water and the oxygen of the carbonyl products comes from the hypervalent iodine reagent.
Du, Yunfei,Ouyang, Yaxin,Wang, Xi,Wang, Xiaofan,Yu, Zhenyang,Zhao, Bingyue,Zhao, Kang
p. 48 - 65
(2021/06/16)

Graphene oxide (GO)-catalyzed chemoselective thioacetalization of aldehydes under solvent-free conditions
An efficient method for the synthesis of open chain, cyclic, and unsymmetrical dithioacetals from aryl/hetero-aryl/aliphatic aldehydes is described. The reaction is performed using graphene oxide (GO) as the catalyst under solvent-free and aerobic conditions. High chemoselectivity is observed in the reaction as aryl/alkyl ketones do not give thioketals under the condition.
Roy, Babli,Sengupta, Debasish,Basu, Basudeb
supporting information
p. 6596 - 6600
(2015/01/08)

Silica-supported phosphorus pentoxide: A reusable catalyst for S,S-acetalization of carbonyl groups under ambient conditions
Phosphorus pentoxide supported on silica gel (P2O 5/SiO2) efficiently acts as a highly active and reusable catalyst for cyclic and non-cyclic S,S-acetalization of a variety of carbonyl compounds under mild, solvent-free an
Shaterian, Hamid Reza,Azizi, Kobra,Fahimi, Nafiseh
experimental part
p. 85 - 91
(2012/01/06)

Efficient method for thioacetalization of carbonyl compounds in the presence of a catalytic amount of benzyltriphenylphosphonium tribromide (BTPTB) under solvent-free conditions
A variety of carbonyl compounds have been successfully converted to the corresponding thioacetal derivatives in good to excellent yields on reaction of carbonyl compounds with 1,2-ethanedithiole, 1,3-propanedithiol, and ethylthiol in the presence of a cat
Hajipour, Abdol Reza,Pourmousavi, Seied A.,Ruoho, Arnold E.
p. 2548 - 2566
(2008/12/22)

Chemoselective dithioacetalization of carbonyl compounds using magnesium hydrogensulfate as efficient heterogeneous catalyst
Carbonyl compounds have been successfully converted into their corresponding dithiolanes and dithianes derivatives with 1,2-ethanedithiol and 1,3-propanedithiol in excellent yield at room temperature and short reaction times using a catalytic amount of ma
Shaterian, Hamid Reza,Hosseinian, Asghar,Ghashang, Majid,Khorami, Fahimeh
scheme or table
p. 2490 - 2501
(2009/08/07)

A rapid and efficient method for 1,3-dithiolane synthesis
A mild, efficient and solvent-free protocol for conversion of aldehydes and ketones into their corresponding 1,3-dithiolanes using 1,2-ethanedithiol in the presence of a catalytic amount of SnCl2·2H2O is reported.
Bez, Ghanashyam,Gogoi, Dipankoj
p. 5155 - 5157
(2007/10/03)

A simple and efficient heterogeneous procedure for thioacetalization of aldehydes and ketones
A new procedure for the protection of aldehydes and ketones as thioacetals promoted by catalytic amount of p-toluene-sulfonic acid and silica gel has been developed. This procedure offers versatility, short reaction time, excellent yield, good selectivity
Ali, Mohammed Hashmat,Gomes, Maria Goretti
p. 1326 - 1332
(2007/10/03)

Indium triflate: A mild Lewis acid catalyst for thioacetalization and transthioacetalization
Protection of a variety of carbonyl compounds as thioacetals using indium triflate, a mild Lewis acid catalyst, was achieved at ambient temperature in very good yield. Transthioacetalization of oxyacetals into thioacetals was also achieved in an excellent
Muthusamy, Sengodagounder,Arulananda Babu, Srinivasarao,Gunanathan, Chidambaram
p. 7897 - 7901
(2007/10/03)

A rapid and efficient method of thioacetalization of carbonyl compounds catalysed by POCl3-montmorillnite
Aldehydes and ketones were thioactalized with 1,2-ethanedithiol in the presence POCl3-montmorillonite at room temperature in excellent yields.
Jin,Sun,Ma,Li
p. 1669 - 1673
(2007/10/03)

The Formylation of an Aromatic Nucleus by the Use of 2-Ethoxy-1,3-dithiolane
The reaction of various phenols with 2-ethoxy-1,3-dithiolane proceeded smoothly in the presence of BF3*Et2O to afford 1,3-dithiolan-2-ylated phenols, which were readily hydrolyzed to the corresponding aldehydes.This process was also extended to N,N-dimethylaniline and indole.
Jo, Shigeo,Tanimoto, Shigeo,Sugimoto, Toyonari,Okano, Masaya
p. 2120 - 2123
(2007/10/02)