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  • synthesis
  • Amberlyst A21 catalyzed one-pot three-component coupling of aldehyde and malononitrile with active methylene compounds such as acetylacetone and ethyl acetoacetate for the synthesis of pharmaceutically important polyfunctionalized 4 H -pyrans has been reported. (hindawi.com)
  • A facile, green, and efficient method has been developed for the synthesis of pyrano[4, 3- b ]pyrans via a one-pot reaction of aromatic aldehydes, malononitrile, and 4-hydroxy-6-methyl-pyran-2-one in the presence of ammonium acetate under solvent-free conditions using grinding method. (springer.com)
  • Aytemir MD, Calis U, Ozalp M (2004) Synthesis and evaluation of anticonvulsant and antimicrobial activities of 3-hydroxy-6-methyl-2-substituted 4 H -pyran-4-one derivatives. (springer.com)
  • Da-Qing S, Li-Hui N, Qi-Ya Z (2008) One-pot three-component synthesis of pyrano[3,2- c ]pyran-5-one derivatives in aqueous medium. (springer.com)
  • Formula
  • 1. A photosensitive resin composition which comprises a crosslinkable polymer, a crosslinking agent and a photosensitizer, said photosensitizer being a pyran derivative represented by the following formula (5) or (6): ##STR27## wherein n is 3 or 4. (google.com)
  • lite
  • After cutting, each lite of PYRAN ® Star fire-rated glass-ceramic shall be permanently labeled according to code requirements with product and manufacturer's name, UL Mark, fire rating, etc. (schott.com)
  • Grighton
  • Grighton is from the Feenix era of Pyran where he has since been regailling us with drunken song, naked pictures of himself holding a tiny wooden mace and hilarious stories. (pyran.co.uk)
  • next
  • Barry will be writing out a bit of story and Pyran will be deciding what happens next through a discord vote. (pyran.co.uk)
  • General This week on Pyran, Warfock asked the all-important question… Here are some of the responses… Now that we've confirmed that Haggis will stick his face into literally any crotch, we'll move onto the next topic - dating advice from Pyrans. (pyran.co.uk)