Tetrahedron p. 337 - 342 (1983)
Update date:2022-08-02
Topics: Synthesis Penicillins
Cowley
Humber
Laundon
Long
Photoinitiated bromination of 3-methyl-ceph-3-em 1S-oxide esters 2, readily obtained from penicillins, gave the corresponding 3-bromomethyl derivatives 5. The 3-bromomethyl 1S-oxides 5b and 5c were converted into the salts 12 and 13 of the 3-methylthiomet
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