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  -