1H NMR utilization of through-space effects. II—conformation of dienic ketones
摘要:
AbstractThe configurational and conformational assignments of the carbonyl group in the Z‐ and E‐1‐(3‐substituted‐5,5‐dimethyl‐2‐cyclohexen‐1‐ylidene)‐2‐butanones are carried out using only the through‐space effects of the carbonyl group. It is demonstrated that, regardless of the Z‐ or E‐configuration or the nature of the substituent in position 3, the conformation of the carbonyl group is always s‐cis.
Conjugate addition reaction of trimethylsilylacetonitrile with α,β-unsaturated carbonyl compounds. Synthetic studies toward sesbanimide
作者:Kiyoshi Tomioka、Kenji Koga
DOI:10.1016/s0040-4039(01)90021-8
日期:1984.1
Lithiated trimethylsilylacetonitrile was allowed to react with some α,β-unsaturated carbonylcompounds to give the corresponding conjugateaddition products.