Tetrahedron Letters p. 2745 - 2746 (1987)
Update date:2022-08-05
Topics:
Tsuji, Teruji
Itani, Hikaru
Ishitobi, Hiroyuki
Addition reaction of methanol to 7-methylsulfeniminocephem 1β-oxide derivatives (6 and 12) under acidic conditions gave exclusively 7β-amino-7α-methoxycephem 1β-oxides (7) stabilized by the formation of an intramolecular hydrogen bond between the 7β-amino and the oxygen atom at the 1-position.
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(1987)
