... 1413 , Vol. 33 (1985) 0.01 mol) and triethyl orthoformate (] 924 g, 0.013 mol) in 12 ml of acetic anhydride was heated at 110 0C for 2 h and then ... 4) For a review of the chemistry of oxindoles, see JR Sundberg “The Chemistry of Indole,” Academic Press, New York, 1970, p. 341. ...