TY  - JOUR
A1  - Schultze, Christiane
A1  - Foß, Stefan
A1  - Schmidt, Bernd
T1  - 8-Prenylflavanones through microwave promoted tandem claisen rearrangement/6-endo-trig cyclization and cross metathesis
JF  - European journal of organic chemistry
N2  - Prenylated flavanones were obtained from ortho-allyloxy chalcones through a one-pot sequence of Claisen rearrangement and 6-endo-trig cyclization, followed by olefin cross metathesis of the intermediate allyl flavanones with 2-methyl-2-butene. The synthetic utility of this route is illustrated for the synthesis of several naturally occurring prenyl flavanones.
KW  - tandem reactions
KW  - arenes
KW  - oxygen heterocycles
KW  - microwave chemistry
KW  - rearrangement
Y1  - 2020
U6  - https://doi.org/10.1002/ejoc.202001378
SN  - 1434-193X
SN  - 1099-0690
VL  - 2020
IS  - 47
SP  - 7373
EP  - 7384
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Schmidt, Bernd
A1  - Kunz, Oliver
T1  - alpha,beta-Unsaturated delta-Valerolactones through RCM-Isomerization Sequence
JF  - Synlett : accounts and rapid communications in synthetic organic chemistry
N2  - alpha,beta-Unsaturated d-lactones are accessible via a sequential ring-closing metathesis (RCM) double-bond migration reaction starting from butenoates of allyl alcohols. This approach proceeds efficiently with lower catalyst loadings and higher initial substrate concentrations compared to the alternative RCM of acrylates derived from homoallylic alcohols.
KW  - ruthenium
KW  - lactones
KW  - tandem reactions
KW  - metathesis
KW  - esters
Y1  - 2012
U6  - https://doi.org/10.1055/s-0031-1290488
SN  - 0936-5214
IS  - 6
SP  - 851
EP  - 854
PB  - Thieme
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Schmidt, Bernd
A1  - Krehl, Stefan
A1  - Sotelo-Meza, Veronica
T1  - Synthesis of chromanes through RCM-Transfer hydrogenation
JF  - Synthesis
N2  - A sequential ruthenium-catalyzed ring-closing metathesis-transfer hydrogenation sequence has been established as a synthesis of chromanes starting from 2-(allyloxy)styrenes. The sequence requires only one precatalyst, the first-generation Grubbs catalyst, which is converted into a ruthenium hydride species in situ. Propan-2-ol serves as a chemical trigger for the formation of the ruthenium hydride and as hydrogen source.
KW  - ruthenium
KW  - chromanes
KW  - tandem reactions
KW  - metathesis
KW  - styrenes
Y1  - 2012
U6  - https://doi.org/10.1055/s-0031-1289758
SN  - 0039-7881
VL  - 44
IS  - 11
SP  - 1603
EP  - 1613
PB  - Thieme
CY  - Stuttgart
ER  -