Synthesis p. 618 - 621 (1989)
Update date:2022-07-30
Topics:
Chen, Ruyu
Bao, Rong
N-Substituted isatoic anhydrides 4 react with 2-bromoethylamino hydrobromide in the presence of triethylamine to form oxazolines 6, which are treated with phosphorus trichloride to give a key intermediate 7.Reaction of 7 with phenyl isothiocyanate yields fused phosphorus heterocycles 9.Several methods for preparing compounds 9 and the mechanism of cyclization are discussed.
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(1958)
