- Synthesis of a new class of arylsulfonylethylsulfonylmethyloxazolines and thiazolines
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A new class of arylsulfonylethylsulfonylmethyl oxazolines and thiazolines were prepared using multistep, one-pot methodologies exploiting lanthanide alkoxides and under microwave irradiation. The microwave method provides an excellent approach in a single step with high yields.
- Padmavathi, Venkatapuram,Venkatesh, Bhumireddy Chinnachennaiahgari,Premakumari, Chokkappagari,Padmaja, Adivireddy
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p. 646 - 651
(2012/09/07)
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- A Very Simple and Convenient Synthesis of Tosylethylene and (E)-1,2-Ditosylethylene
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A two-steps procedure for the synthesis of p-tolyl vinyl sulfone in 80percent yield by reaction of sodium p-toluenesulfinate with 1-bromo-2-chloroethane followed by in situ dehydrochlorination with triethylamine is described.Iodosulfonylation of p-tolyl v
- Alonso, Diego A.,Arques, Antonio,Najera, Carmen,Sansano, Jose M.
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p. 449 - 452
(2007/10/03)
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- MODERN FRIEDEL-CRAFTS CHEMISTRY. XI. CYCLIZATION OF ARYL HALOALKYL SULFONES, ARYLSULFONYLACYL CHLORIDES AND THEIR CORRESPONDING SULFIDES
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The sulfone group deactivation for cyclialkylation and cycliacylation reactions in the presence of Friedel-Crafts catalysts was demonstrated in a number of aryl chloroalkylsulfones (1-8) and arylsulfonylacyl chlorides (17a-22a), respectively.As expected, the corresponding arylchloroalkyl sulfides (9-16) and arylmercaptoacyl chlorides (13a-28a) underwent ring-closure reaction in most cases under the same conditions.The ease of cyclization was governed by the ring size, the stability of the attacking carbocation and the nucleophilicity of the aryl moiety.Also, the behaviour of benzyl sulfones (29, 31a, and 32a) and sulfides (33, 34a and 36a) was inconsistent.Noteworthy, the Friedel-Crafts cyclization reaction is thus considered an accessible method for the synthesis of compounds 37-41 and 45, 51.
- Abdel-Wahab, Aboel-Magd A.,El-Khawaga, Ahmed M.,El-Zohry, Maher F.,Khalaf, Ali A.
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