Role of the Heteroatoms in the Complex Metal Hydride Reduction of 2-<i>t</i>-Butyl-1,3-dioxan-5-one and 3-Oxoquinolizidine: Comparison of Their Reactivity and Stereochemistry with Those of the Corresponding Carbocyclic Compounds
作者:Yasuhisa Senda、Hiroshi Sakurai、Hiroki Itoh
DOI:10.1246/bcsj.72.285
日期:1999.2
The complexmetalhydridereductions of 2-t-butyl-1,3-dioxan-5-one (1) and 3-oxoquinolizidine (3) are faster than those of the corresponding carbocyclic compounds, 4-t-butylcyclohexanone (2) and trans-2-decalone (4). The stereoselectivities were similar in the LiAlH4 reduction, but the heteracyclohexanones exhibited higher stereoselectivity with NaBH4. These facts are discussed in terms of the intramolecular
was observed in the latter two compounds regardless of the catalyst metals used here. These results were explained in terms of intramolecular nO–πCO interaction, which was supported by 13C NMR chemical shifts of the carbonyl carbons and CNDO/2calculation.