Tetrahedron Letters p. 4233 - 4236 (1983)
Update date:2022-08-04
Topics:
Takano, Seiichi
Hirama, Michiyasu
Seya, Kazuhiko
Ogasawara, Kunio
Nucleophilic displacement reactions of the methanesulfonates (8a-c) of the 1-O-benzoyl-1,2-, -1,3-, and -1,4-glycols (7a-c) with potassium acetate in boiling acetic anhydride have been examined.Both benzoyloxy-group participation pathway (path A) and SN2 displacement pathway (path B) have been involved in the 1,2-(8a)- and 1,3-(8b)-substrates to give a mixture of the primary (10a,b) and the secondary (11a,b) acetates with complete inversion of chiralities.On the other hand, only SN2 displacement pathway (path B) has been involved in the 1,4-substrate (8c) to give the secondary acetate (11c) with inversion of the chirality.
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