Photochemische Reaktionen. 92. Mitteilung [1]. Photochemistry of Imidazolides II. C2-C3 Cleavage of Carboxylic Acid Chains. A Convenient New Method for the Side-Chain Degradation of Bile Acids and of Lanosterol
作者:Shigeo Iwasaki
DOI:10.1002/hlca.19760590814
日期:1976.12.15
AbstractIrradiation of N‐stearoylimidazole (1) gave hexadec‐1‐ene (4) in 45% yield, whereas irradiation of N‐(4‐methylstearoyl)imidazole (13) possessing a tertiary hydrogen atom γ to the carbonyl group led to 2‐methylhexadec‐1‐ene (14) in 62% yield. These results are explained by a two‐stage process: acyl migration, followed by Norrish Type II eliminatior. The reaction has been utilized for the side chain degradation of bile acids and of lanosterol, in which the second stage of the reaction was shown to proceed in up to 70% yield.
Cason et al., Journal of Organic Chemistry, 1949, vol. 14, p. 153
作者:Cason et al.
DOI:——
日期:——
Smith; Rouault, Journal of the American Chemical Society, 1943, vol. 65, p. 748