Beckmann rearrangements in the bicyclo[2.2.1]heptan-2-one series
作者:Peter A. Hunt、Christopher J. Moody
DOI:10.1016/s0040-4039(01)93944-9
日期:1989.1
In contrast to norcamphoroxime (2), the E-oxime (6), derived from the acetonide of 5,6-dihydroxybicyclo[2.2.1]heptan-2-one, undergoes regiospecific Beckmannrearrangement to give the lactam (7).
Beckmann fragmentation versus Beckmann rearrangement in dehydronorcamphor derivatives
作者:Daniel G. VerHaeghe、Gregory S. Weber、Paul A. Pappalardo
DOI:10.1016/s0040-4039(00)99316-x
日期:1989.1
Attempted Beckmann rearrangement of dehydronorcamphor oxime resulted in Beckmann fragmentation and dimerization of the intermediate cyanomethylcyclopenta-1,3-diene isomers. The dienes can be trapped by N-phenylmaleimide to yield two isomeric crystalline adducts. When the olefin in dehydronorcamphor oxime is effectively blocked, Beckmann rearrangement takes place to provide stereochemically pure bicyclic