TY  - JOUR
A1  - Schmidt, Bernd
A1  - Riemer, Martin
T1  - Microwave-Promoted Deprenylation: Prenyl Ether as a Thermolabile Phenol Protecting Group
JF  - Synthesis
N2  - 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.
KW  - microwave irradiation
KW  - phenols
KW  - chromenes
KW  - protecting groups
KW  - Claisen rearrangement
Y1  - 2016
U6  - https://doi.org/10.1055/s-0035-1561366
SN  - 0039-7881
SN  - 1437-210X
VL  - 48
SP  - 1399
EP  - 1406
PB  - Thieme
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Schmidt, Bernd
A1  - Berger, René
A1  - Kelling, Alexandra
A1  - Schilde, Uwe
T1  - Pd-Catalyzed [2+2+1] coupling of alkynes and arenes phenol diazonium salts as mechanistic trapdoors
JF  - Chemistry - a European journal
N2  - 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.
KW  - alkynes
KW  - diazo compounds
KW  - palladium
KW  - phenols
KW  - spirocycles
Y1  - 2011
U6  - https://doi.org/10.1002/chem.201100609
SN  - 0947-6539
VL  - 17
IS  - 25
SP  - 7032
EP  - 7040
PB  - Wiley-Blackwell
CY  - Malden
ER  -