Hydroxy-rhodium(I) catalyzed regioselective Michael addition of cyclic enones
作者:Gullapalli Kumaraswamy、Dasa Rambabu
DOI:10.1016/j.tetlet.2011.12.057
日期:2012.2
Hydroxy-rhodium catalyzed dimerization of various cyclicenones to the corresponding α-enone adducts is developed. The key feature of this method is that the base-sensitive, highly substituted enones also undergo dimerization and the resultant products are obtained in moderate to good yields.
The nitrosoDiels-Alder (NDA) reaction is an attractive strategy for the synthesis of 3,6-dihydro-1,2-oxazines and 1-amino-4-hydroxy-2-ene derivatives. Herein we report the Cu(I)-DTBM-Segphos catalyzed asymmetric intermolecular NDA reaction of variously substituted cyclic 1,3-dienes using highly reactive nitroso compounds derived from pyrimidine and pyridazine derivatives. In most of the cases studied