Some work leading to syntheses of oestrone is presented. It was generally found necessary to protect the 1-carbonyl function in 5,6,7,7a-tetrahydro-8β-methylindane-1,5-dione before the introduction of alkyl groups at position 4. Alkylations of 2-methylcyclopentane-1,3-dione have been made and the results compared with similar studies on 2-methylcyclohexane-1,3-dione.
Reactions of α, α-disubstituted selenoamides with organolithium reagents leading to unsymmetrical ketones
作者:Toshiaki Murai、Tatsuya Ezaka、Shinzi Kato
DOI:10.1016/s0040-4039(98)00764-3
日期:1998.6
alpha,alpha-Disubstituted selenoamides were easily converted to unsymmetrical ketones in high yields by the reaction with alkyllithiums, whereas the reaction with alkynyllithium and methyl iodide gave alpha,beta-unsaturated ketone and dialkynylamine. (C) 1998 Elsevier Science Ltd. All rights reserved.