@article{SchultzeSchmidt2018,
  author    = {Schultze, Christiane and Schmidt, Bernd},
  title     = {Ring-closing-metathesis-based synthesis of annellated coumarins from 8-allylcoumarins},
  series = {Beilstein journal of organic chemistry},
  volume    = {14},
  journal   = {Beilstein journal of organic chemistry},
  publisher = {Beilstein-Institut zur F{\"o}rderung der Chemischen Wissenschaften},
  address   = {Frankfurt, Main},
  issn      = {1860-5397},
  doi       = {10.3762/bjoc.14.278},
  pages     = {2991 -- 2998},
  year      = {2018},
  abstract  = {8-Allylcoumarins are conveniently accessible through a microwave-promoted tandem Claisen rearrangement/Wittig olefination/cyclization sequence. They serve as a versatile platform for the annellation of five- to seven-membered rings using ring-closing olefin metathesis (RCM). Furano-, pyrano-, oxepino- and azepinocoumarins were synthesized from the same set of precursors using Ru-catalyzed double bond isomerizations and RCM in a defined order. One class of products, pyrano[2,3-f]chromene-2,8-diones, were inaccessible through direct RCM of an acrylate, but became available from the analogous allyl ether via an assisted tandem catalytic RCM/allylic oxidation sequence.},
  language  = {en}
}
@article{SchmidtRiemer2016,
  author    = {Schmidt, Bernd and Riemer, Martin},
  title     = {Synthesis of Allyl- and Prenylcoumarins via Microwave-Promoted Tandem Claisen Rearrangement/Wittig Olefination},
  series = {Synthesis},
  volume    = {48},
  journal   = {Synthesis},
  publisher = {Thieme},
  address   = {Stuttgart},
  issn      = {0039-7881},
  doi       = {10.1055/s-0035-1560501},
  pages     = {141 -- 149},
  year      = {2016},
  abstract  = {Allyl, dimethylallyl, crotyl, and prenyl ethers of various aromatic ortho-hydroxy carbonyl compounds undergo a tandem sequence of Claisen rearrangement, carbonyl olefination, and cyclization upon microwave irradiation in the presence of a stabilized ylide. The products are multiply substituted 6- or 8-allylated or prenylated coumarins (2H-chromen-2-ones).},
  language  = {en}
}