Tetrahedron Letters p. 3363 - 3366 (1999)
Update date:2022-08-05
Topics:
Hucher, Nicolas
Daich, Adam
Netchitailo, Pierre
Decroix, Bernard
Pyrrolidino(or isoindolo)[1,3]benzothiazines 1 a,b were efficiently synthesized in a four-step sequence from the known o-(benzylthio) benzyl alcohol 2. The key step was the nucleophilic attack of the sulfur atom onto N-acyliminium ion 6 which was generated in high acidic medium from ω- carbinol lactam 5. The last was regioselectively obtained by reduction of the parent imide 4.
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Doi:10.1021/ja01049a022
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