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Dipropargyl ethers

Dipropargyl ether from Propargyl Alcohol, Propargy] Bromide and NaOH... [Pg.261]

Dipropargyl ethers can be cyclized to isobenzofurane derivatives both in palladium or nickel catalysed transformations. In the former case dipent-2-ynyl ether was coupled with allyl tosylate to give the corresponding bicycle, albeit in poor yield.115 The same ring system was obtained in good yield in the nickel catalysed reductive cyclization of the diyne and the allene shown in 3.91... [Pg.61]

Diphosphinoethane, 0953 Diphosphoryl chloride, 4162 Dipotassium /(-cyclooctatetraene, 2942 Dipotassium diazirine-3,3-dicarboxylate, 1336 Dipotassium hexafluoronickelate(IV), 4357b Dipotassium aci-nitroacetate, 0668 Dipotassium phosphinate, 4425 Dipotassium triimidotellurite, 4489 Dipropargyl ether, see Di(2-propynyl) ether, 2320 f Di-2-propenyl ether, see Diallyl ether, 2425... [Pg.2088]

Cycloaddition of nitriles with dipropargyl ethers. A new synthesis of pyridoxine (4, vitamin BJ is based on the (2 + 2 + 2 cyclo.iddition of acetonitrile with dipropargyl ethers catalyzed by Cp,Co or Cp(CO),Co to torn the pyridine derivative I. Subsequent steps involve rearrangement of the N-oxide of 1 to the 3-hydroxypyridine 2 with acetic anhydride. The final step involves the known cleavage of the dihydrofuranc ring. [Pg.180]

Dipropargyl ether, see Di(2-propynyl) ether, 2327 f Di-2-propenyl ether, see Diallyl ether, 2431... [Pg.2003]

The cyclopolymerization of symmetrical disub-situted dipropargyl derivative bis(3-trimethylsilyl-2-propynyl) ether (20) was attempted as shown in Scheme 4. The polymer yields were generally very... [Pg.48]

Unsymmetrically cyclized poly(dipropargyl ether) derivatives bearing a-substituents were also studied. [Pg.48]

Table 11. Polymerization of Dipropargyl Ethers with Various a-Substituent Groups by M0CI5 ... Table 11. Polymerization of Dipropargyl Ethers with Various a-Substituent Groups by M0CI5 ...
Polymerized In dioxane at 60 °C. Mole ratio of monomer to catalyst was 50. Dipropargyl ether (DPE), 3-(propargyloxy)-l- ... [Pg.49]

See other pages where Dipropargyl ethers is mentioned: [Pg.768]    [Pg.840]    [Pg.768]    [Pg.768]    [Pg.768]    [Pg.840]    [Pg.768]    [Pg.768]    [Pg.199]    [Pg.261]    [Pg.369]    [Pg.501]    [Pg.386]    [Pg.302]    [Pg.254]    [Pg.172]    [Pg.367]    [Pg.559]    [Pg.179]    [Pg.1154]    [Pg.427]    [Pg.199]    [Pg.386]    [Pg.402]    [Pg.22]    [Pg.975]    [Pg.991]    [Pg.991]    [Pg.991]    [Pg.1154]    [Pg.28]    [Pg.147]    [Pg.47]    [Pg.47]    [Pg.48]    [Pg.49]    [Pg.55]   


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