... Tetrahedron. Volume 51, Issue 10, 6 March 1995, Pages 2929–2938. ... Rev. Heteroatom Chem., vol 7 (1992), p. 191. ... An analogous transformation of 3-(phenylthio)azetidin-2-ones to azetidine-2,3-diones has been reported, see Tetrahedron Lett., 25 (1984), p. 4733. ...