TY  - JOUR
A1  - Schmidt, Bernd
A1  - Riemer, Martin
T1  - Synthesis of Allyl- and Prenylcoumarins via Microwave-Promoted Tandem Claisen Rearrangement/Wittig Olefination
JF  - Synthesis
N2  - 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).
KW  - aldehydes
KW  - coumarins
KW  - ketones
KW  - microwave irradiation
KW  - olefination
KW  - tandem reaction
KW  - ylides
Y1  - 2016
U6  - https://doi.org/10.1055/s-0035-1560501
SN  - 0039-7881
SN  - 1437-210X
VL  - 48
SP  - 141
EP  - 149
PB  - Thieme
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Schmidt, Bernd
A1  - Riemer, Martin
A1  - Schilde, Uwe
T1  - Chroman-4-ones via microwave-promoted domino claisen rearrangement-oxa-michael addition: Synthesis of tabchromones A and B
JF  - Synlett : accounts and rapid communications in synthetic organic chemistry
N2  - Allyl phenyl ethers with a pendant enone substituent undergo, upon microwave irradiation, a domino sequence of Claisen rearrangement and 6-endo-trig-cyclization to furnish functionalized chroman-4-ones. The natural products tabchromones A and B were synthesized via this method.
KW  - cyclization
KW  - Michael addition
KW  - rearrangement
KW  - tandem reaction
KW  - Wacker reaction
Y1  - 2014
U6  - https://doi.org/10.1055/s-0034-1379364
SN  - 0936-5214
SN  - 1437-2096
VL  - 25
IS  - 20
SP  - 2943
EP  - 2946
PB  - Thieme
CY  - Stuttgart
ER  -