scholarly journals β-Cyclodextrin–Epichlorohydrin Copolymers as Efficient Catalysts in Phase-Transfer-Catalyzed Nucleophilic Substitution Reactions

1987 ◽  
Vol 16 (4) ◽  
pp. 715-718 ◽  
Author(s):  
Nobuo Tanaka ◽  
Atsumi Yamaguchi ◽  
Yoshio Araki ◽  
Mikio Araki
Keyword(s):  
Nucleophilic Substitution ◽  
Phase Transfer ◽  
Substitution Reactions ◽  
Nucleophilic Substitution Reactions

Betylates. 4. The synthesis and preparative nucleophilic substitution reactions of alkyl S-[3]betylates

1983 ◽  
Vol 61 (2) ◽  
pp. 235-243 ◽  
Author(s):  
James Frederick King ◽  
Stanislaw Skonieczny ◽  
Gary Allan Poole
Keyword(s):  
Nucleophilic Substitution ◽  
Phase Transfer ◽  
Ion Pair ◽  
Substitution Reactions ◽  
Nucleophilic Substitution Reactions ◽  
Transfer Processes ◽  
Nitrogen Analogues

Alkyl S-[3]betylates (S,S-dialkyl-S-3[(alkyloxy)sulfonyl]propylsulfonium salts), the first examples of S-betylates (sulfonioalkanesulfonic esters), have been synthesized by two routes, and their suitability as intermediates in the transformation of alcohols by nucleophilic substitution reactions examined. They have been found to react readily in stoichiometric phase transfer processes, including substrate–reagent ion-pair reactions, like their previously studied nitrogen analogues, with the following particular features: (a) they may be used with basic nucleophiles (unlike [2]betylates), (b) they are more simply made from commercially available starting materials than [3]betylates, and (c) they can be made by a route that avoids a final alkylation step.

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