Abstract
The benzimidazoles 16a-f have been prepared from N-oxides 15a-d. Treatment of N-oxides 15c and 15d with a mixture of acetic anhydride and sodium acetate gave the corresponding acetoxy derivatives 26 and 27 via a regiospecific nucleophilic substitution reaction. N-Oxides 15c and 15d were also deoxygenated by 2,3-dichloro-5,6-dicyanobenzoquinone (DDQ).
Original language | English |
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Pages (from-to) | 1441-1448 |
Journal | Tetrahedron |
Volume | 55 |
Issue number | 5 |
DOIs | |
Publication status | Published - 29 Jan 1999 |