1. Throughout this paper the names “isatoic anhydride” and “2H-3,1-benzoxazine-2,4(1H)dione” are used interchangeably. Commercial sources still prefer the first whereas Chemical Abstracts subscribes to the latter. We have adopted the Chemical Abstract numbering system for substituted isatoic anhydrides, but we feel that it will be easier to read if we use the expression “N-substituted isatoic anhydride” rather than “N-substituted-2H-3,1-benzoxazine-2,4(1H)dione”.
2. Tetracyclic quinazolinone derivatives
3. Chemistry of 2H-3,1-benzoxazine-2,4-(1H)-dione (isatoic anhydride). 2. Reactions with thiopseudoureas and carbanions
4. Thioncarbonsäureester, II. Reaktionen von Monothionmalonsäureestern mit Aminoverbindungen
5. All Kugelrohr distillations were done on an Aldrich Kugelrohr distillation apparatus and the boiling points given are approximate.