The effect of substitution at the 'central methane' on the photoreactivity of 3-benzylfuran-2(5H)ones 5a-g was investigated. Despite its di-pi-methane structure, photochemical arylation was effected to give substituted indenofuranones 6 in good yields. Only the substitution by phenyl caused the di-pi-methane rearrangement to give a cyclopropanofuranone 18g in moderate yield.
Extension of the Modified Stobbe Condensation. Acid-Catalyzed Decomposition of the Products and a Lacto—Enoic Tautomerism<sup>1</sup>
作者:William S. Johnson、Jack W. Petersen、William P. Schneider
DOI:10.1021/ja01193a020
日期:1947.1
Stobbe; Heun, Justus Liebigs Annalen der Chemie, 1899, vol. 308, p. 140
作者:Stobbe、Heun
DOI:——
日期:——
Horii et al., Chemical and pharmaceutical bulletin, 1961, vol. 9, p. 451,453