Silicon-directed Norrish type I cleavage of β-trimethylsilyl cycloalkanones
作者:Jih Ru Hwu、Bryant A. Gilbert、Lung Ching Lin、Ben Ruey Liaw
DOI:10.1039/c39900000161
日期:——
The Me3Si group in β-trimethylsilylcycloalkanones was able to direct the NorrishtypeIcleavage by providing regioselectivity in the C-1-C-2 bond cleavage and by increasing the quantum yield and the reaction rate.
HWU, JIH RU;GILBERT, BRYANT A.;LIN, LUNG CHING;LIAW, BEN RUEY, J. CHEM. SOC. CHEM. COMMUN.,(1990) N, C. 161-163
作者:HWU, JIH RU、GILBERT, BRYANT A.、LIN, LUNG CHING、LIAW, BEN RUEY
DOI:——
日期:——
TIETZE, LUTZ E.;WUNSCH, JOSEF R., SYNTHESIS,(1990) N1, C. 985-990
作者:TIETZE, LUTZ E.、WUNSCH, JOSEF R.
DOI:——
日期:——
Intramolecular Ene and Related Reactions, Part 9. Photochemically Induced Synthesis of Allylsilane Carbaldehydes
作者:Lutz F. Tietze、Josef R. Wünsch
DOI:10.1055/s-1990-27070
日期:——
Allylsilane carbaldehydes are valuable substrates for the tandem Knoevenagel allylsilane and iminium cyclization. They can easily be prepared by a photochemical α-cleavage of cyclic ketones bearing a trimethylsilylmethyl group in the α-position (Norrish Type I cleavage). The photolytic process is facilitated by the silicon due to its stabilization of a radical in the β-position. Irradiation of the ketones 15a-d leads mainly to the aldehydes 16a-d. In addition irradiation of 19a gives mostly the aldehyde 20.