Dimethyl acetylenedicarboxylate, 98%, Thermo Scientific Chemicals

General References:

1. Peter M. Blonsky.; D. F.Shriver.; Paul Austin.;  H. R. Allcock. Polyphosphazene solid electrolytes. J. Am. Chem. Soc.1984106, (22), 6854-6855.
2. Barry M. Trost.; Gerald J. Tanoury. An unusual mechanism of a palladium-catalyzed intramolecular carbametalation. A novel palladium-catalyzed rearrangement. J. Am. Chem. Soc.1988110, (5), 1636-1638.
3. Dienophile in Diels-Alder and related reactions. For addition to a bis-allene, followed by dimerization to a paracyclophane, see: Org. Synth. Coll., 7, 485 (1990).
4. For use in the masking of double bonds for subsequent release by cycloreversion, see: J. Org. Chem., 44, 962 (1979). Review of cycloreversion reactions in organic synthesis: Synthesis, 121 (1985).
5. Used in synthesis of a wide variety of heterocyclic systems including benzo[b]thiophenes from thiophenols: Acta Chem. Scand., 27, 595 (1973), and chromones from phenols: Austral. J. Chem., 48, 677 (1995):
6. Stabilized anions derived from cyclic ß-keto phosphonates undergo ring expansion, via a tandem Michael-Aldol-fragmentation mechanism, to give phosphonates with an additional two carbons in the ring, thus providing a route to highly functionalized medium ring compounds: J. Org. Chem., 60, 3084 (1995):
7. Reacts with activated carbonyl compounds, such as ɑ-keto esters or ɑ-keto nitriles, in the presence of triphenylphosphine, to give highly functionalized -butyrolactones: J. Org. Chem., 61, 4516 (1996). For a further example with reaction scheme, see 2,2,2-Trifluoroacetophenone, A11403.