- Nickel(II) chloride hexahydrate catalyzed reaction of aromatic aldehydes with 2-mercaptoethanol: Formation of supramolecular helical assemblage of the product
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Various aromatic aldehydes on reaction with 2-mercaptoethanol provided an unanticipated product, bis(2-hydroxyethyl)dithioacetals (3) as the major product along with the expected product 1,3-oxathiolanes (4) in the presence of 0.05 equiv amount of nickel(
- Laskar, Rajibul A.,Begum, Naznin A.,Mir, Mohammad Hedayetullah,Rohman, Md. Rumum,Khan, Abu T.
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p. 5839 - 5844
(2013/10/21)
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- Silica-gel supported sulfamic acid (SA/SiO2) as an efficient and reusable catalyst for conversion of ketones into oxathioacetals and dithioacetals
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A simple and efficient method for the conversion of carbonyl compounds to oxathioacetals and dithioacetals using SA/SiO2 as an acid catalyst has been achieved. SA/SiO2 is easily recovered from the reaction mixture and can be reused at least 15 times without loss of catalytic activity.
- Aoyama, Tadashi,Suzuki, Toshihiko,Nagaoka, Takashi,Takido, Toshio,Kodomari, Mitsuo
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p. 553 - 566
(2013/01/15)
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- An efficient method for the oxathioacetalization of carbonyl compounds using N-bromosaccharin as a catalyst
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A mild and highly chemoselective method for the preparation of oxathiolane from aliphatic and aromatic aldehydes and ketones with 2-mercaptoethanol in the presence of catalytic amount of N-bromosaccharin at room temperature is reported.
- Alinezhad, Heshmatollah,Fallahi, Shahrouz
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experimental part
p. 927 - 929
(2012/08/28)
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- Efficient procedure for oxathioacetalization using the novel ionic liquid
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The novel ionic liquid with multi-SO3H groups has been synthesized through the simple procedure and its catalytic activity for the oxathioacetalization was investigated carefully at room temperature under solvent-free condition. The results sho
- Bao, Shaohua,Chen, Lu,Ji, Yongjun,Yang, Jianguo
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experimental part
p. 2119 - 2122
(2011/10/03)
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- Facile protection of carbonyl compounds as oxathiolanes and transoxathioacetalization of oxyacetals promoted by iron(III) trifluoroacetate or trifluoromethanesulfonate as chemoselective and recyclable catalysts
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Oxathioacetalization of carbonyl compounds and transoxathioacetalization of O,O-acetals/ketals are reported under nearly neutral conditions promoted by iron(III) trifluoroacetate [Fe(CF3CO2)3] or trifluoromethanesulfonate
- Adibi, Hadi,Jafari, Hadi
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p. 679 - 682
(2008/01/01)
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- An efficient and chemoselective method for conversion of carbonyl compounds to 1,3-oxathiolanes with 2-mercaptoethanol catalyzed by TiCl 4-montmorillonite
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Formation of 1,3-oxathiolanes from aldehydes and ketones using 2-mercaptoethanol in the presence of TiCl4-montmorillonite under mild reaction conditions in excellent yields is described. Chemoselective monothioacetalization of aldehyde in the p
- Jin, Tong-Shou,Zhao, Rui-Qiao,Ma, Yan-Ran,Yang, Mi-Na,Guo, Jun-Jie,Li, Tong-Shuang
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p. 503 - 505
(2007/10/03)
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- Iron(III) fluoride: A highly efficient and versatile catalyst for the protection of carbonyl compounds under solvent-free conditions
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Carbonyl compounds are successfully converted into oxathioacetals and dithioacetals with 2-mercaptoethanol and ethane-1,2-dithiol using a catalytic amount of iron(m) fluoride under solvent-free conditions. The catalysts were recovered and reused in variou
- Bandgar, Babasaheb P.,Kamble, Vinod T.,Kulkarni, Ashwini
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p. 607 - 610
(2007/10/03)
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- Silica gel-supported polyphosphoric acid (PPA/SiO2) as an efficient and reusable catalyst for conversion of carbonyl compounds into oxathioacetals and dithioacetals
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A simple and efficient method for the conversion of carbonyl compounds to oxathioacetals and dithioacetals by using polyphosphoric acid supported on silica gel (PPA/SiO2) as an acid catalyst have been developed. PPA/SiO2 is easily re
- Aoyama, Tadashi,Takido, Toshio,Kodomari, Mitsuo
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p. 2307 - 2310
(2007/10/03)
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- Ytterbium(III) triflate-catalyzed conversion of carbonyl compounds into 1,3-oxathiolanes in ionic liquids
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The reaction of carbonyl compounds with 2-mercapto-ethanol to prepare 1,3-oxathiolanes has been successfully carried out in ionic liquids using ytterbium(III) triflate as a catalyst. Yields of the products are high and the catalyst can be easily recovered
- Kumar, Anil,Jain, Nidhi,Rana, Sandeep,Chauhan, Shive M. S.
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p. 2785 - 2787
(2007/10/03)
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- Yttrium triflate as an efficient and useful catalyst for chemoselective protection of carbonyl compounds
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Carbonyl compounds have been successfully converted into their corresponding oxathiolane, dithiolane, and dithiane derivatives with 2-mercaptoethanol, 1,2-ethanedithiol, and 1,3-propanedithiol using catalytic amount of yttrium triflate. In addition, by us
- De, Surya Kanta
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p. 2339 - 2341
(2007/10/03)
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- A mild and efficient method for the protection of carbonyl compounds as oxathiolanes, dithiolanes and dithianes catalyzed by molybdenyl acetylacetonate
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Carbonyl compounds have been successfully converted into their corresponding oxathiolane, dithiolane and dithiane derivatives in excellent yields with 2-mercaptoethanol, 1,2-ethanedithiol and 1,3-propanedithiol using a catalytic amount of molybdenyl acety
- Rana, Kalyan Kumar,Guin, Chandrani,Jana, Samaresh,Roy, Subhas Chandra
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p. 8597 - 8599
(2007/10/03)
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- Scandium(III) Triflate as an Efficient and Recyclable Catalyst for Chemoselective Conversion of Carbonyl Compounds to 1,3-Oxathiolanes
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A variety of carbonyl compounds can be easily and rapidly converted to the corresponding 1,3-oxathiolanes in the presence of a catalytic amount of scandium(III) triflate [Sc(OTf)3] in CH2Cl2. After completion of the reacti
- Karimi, Babak,Ma'mani, Leila
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p. 2503 - 2506
(2007/10/03)
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- Mild and efficient iodine catalyzed protection of carbonyl compounds as oxathiolane derivatives
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A number of aldehydes and ketones have been protected as their corresponding 1,3-oxathiolane derivatives with 2-mercaptoethanol using catalytic amount of molecular iodine.
- Rana,Guin,Banerjee,Roy
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p. 1005 - 1006
(2007/10/03)
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- 2,4,4,6-Tetrabromo-2,5-cyclohexadienone (TABCO), N-bromosuccinimide (NBS) and bromine as efficient catalysts for dithioacetalization and oxathioacetalization of carbonyl compounds and transdithioacetalization reactions
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The use of 2,4,4,6-tetrabromo-2,5-cyclohexadienone (TABCO), N-bromosuccinimide (NBS), and bromine as efficient catalysts for conversion of carbonyl compounds to their cyclic and acyclic dithioacetals and 1,3-oxathiolanes under mild reaction conditions are described. These catalysts are also used for efficient transdithioacetalization of acetals, diacetals, ketals, acylals, enamines, hydrazones, and oximes with high yields in the presence of thiols.
- Iranpoor, Nasser,Firouzabadi, Habib,Shaterian, Hamid Reza,Zolfigol
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p. 1047 - 1071
(2007/10/03)
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- Zirconium tetrachloride (ZrCl4) as an efficient and chemoselective catalyst for conversion of carbonyl compounds to 1,3-oxathiolanes
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Different types of aldehydes and ketones can be efficiently converted into their corresponding 1,3-oxathiolanes using 2-mercaptoethanol (1.5-3.2 equiv.) in the presence of catalytic amount (0.04-0.15 equiv.) of ZrCl4 in CH2Cl2/
- Karimi, Babak,Seradj, Hassan
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p. 805 - 806
(2007/10/03)
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