Tetrahedron Letters p. 3727 - 3730 (1985)
Update date:2022-09-26
Topics:
Brownsort, Peter A.
Paton, Michael R.
Sutherland, Alan G.
ortho-(Phenylpropioloxy)benzonitrile sulphide, generated in situ by thermal decarboxylation of the oxathiazolone (1), undergoes intramolecular 1,3-dipolar cycloaddition forming the chromenoisothiazole (4a); ortho-cinnamoylbenzonitrile sulphides also yield (4), together with nitrile, chromenoquinoline and amino-chromene by-products.
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