Efficient monoacetal formation, unprecedented β-cleavage in caged cyclobutyl ketones and dual epimerization of 1,4-diones in the photochemistry of hexacyclo[10.2.1.0<sup>2,11</sup>.0<sup>4,9</sup>.0<sup>4,14</sup>.0<sup>9,13</sup>]pentadeca-5,7-diene-3,10-dione and related systems in alcoholic solvents
作者:Bipin Pandey、Umesh R. Zope、Nagaraj R. Ayyangar
DOI:10.1039/c39900000107
日期:——
Irradiation of the title compound and related caged cyclobutyl diones in alcoholic solvents at 300 nm furnishes good yields of monoacetals and leads to products arising from β-cleavage and dual epimerization.
Stereospecific solid state sodium borohydride reductions of cage dikotenes
作者:Alan P. Marchand、G.Madhusudhan Reddy
DOI:10.1016/s0040-4020(01)82311-5
日期:1991.8
Solid state reductions of carbonyl groups in three cage diketones, 1a-1c, have been performed by usingsodiumborohydride, and the results thereby obtained have been compared with the corresponding reductions performed in ethanol solution. In each case, the solid state reduction proceeds stereospecifically; hydride transfer occurs exclusively at the face of the carbonyl group. In contrast, the corresponding