@article{SchmidtRiemer2016, author = {Schmidt, Bernd and Riemer, Martin}, title = {Microwave-Promoted Deprenylation: Prenyl Ether as a Thermolabile Phenol Protecting Group}, series = {Synthesis}, volume = {48}, journal = {Synthesis}, publisher = {Thieme}, address = {Stuttgart}, issn = {0039-7881}, doi = {10.1055/s-0035-1561366}, pages = {1399 -- 1406}, year = {2016}, abstract = {para-Substituted aryl prenyl ethers undergo a deprenylation reaction upon microwave irradiation. This offers the opportunity to use a prenyl ether as a thermolabile protecting group in the synthesis of natural products with a chromone structure, which proceeds via a tandem deprenylation/6-endo-cyclization sequence.}, language = {en} } @article{SchmidtBergerKellingetal.2011, author = {Schmidt, Bernd and Berger, Ren{\´e} and Kelling, Alexandra and Schilde, Uwe}, title = {Pd-Catalyzed [2+2+1] coupling of alkynes and arenes phenol diazonium salts as mechanistic trapdoors}, series = {Chemistry - a European journal}, volume = {17}, journal = {Chemistry - a European journal}, number = {25}, publisher = {Wiley-Blackwell}, address = {Malden}, issn = {0947-6539}, doi = {10.1002/chem.201100609}, pages = {7032 -- 7040}, year = {2011}, abstract = {Alkynes and phenol diazonium salts undergo a Pd-catalyzed [2+2+1] cyclization reaction to spiro[4,5]decatetraene-7-ones. This structure was confirmed for one example by X-ray single-crystal structure analysis. The reaction is believed to proceed through oxidative addition of the phenol diazonium cation to Pd(0), subsequent insertion of two alkynes, followed by irreversible spirocyclization.}, language = {en} }