90396-02-4Relevant academic research and scientific papers
CYCLIZATION OF SELECTED BENZYL SULFONE DERIVATIVES UNDER PHASE TRANSFER CATALYTIC CONDITIONS
El-Zohry, Maher F.,El-Khawaga, Ahmed M.,Abdel-Wahab, Aboel-Magd A.
, p. 149 - 152 (2007/10/02)
Seven selected benzyl chloroalkyl sulfones (1a-c) and benzyl carboethoxyalkyl sulfones (1d-g) has been subjected to treatment with aqueous NaOH (50percent) under PTC conditions.Analysis of the product mixtures revealed competitive cyclization, elimination
MODERN FRIEDEL-CRAFTS CHEMISTRY. XI. CYCLIZATION OF ARYL HALOALKYL SULFONES, ARYLSULFONYLACYL CHLORIDES AND THEIR CORRESPONDING SULFIDES
Abdel-Wahab, Aboel-Magd A.,El-Khawaga, Ahmed M.,El-Zohry, Maher F.,Khalaf, Ali A.
, p. 31 - 44 (2007/10/02)
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.
