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.
Bauduin,G. et al., Bulletin de la Societe Chimique de France, 1973, p. 359 - 363
作者:Bauduin,G. et al.
DOI:——
日期:——
DAUBEN, W. G.;BUNCE, R. A., J. ORG. CHEM., 1983, 48, N 24, 4642-4648
作者:DAUBEN, W. G.、BUNCE, R. A.
DOI:——
日期:——
Evaluating β-amino acids as enantioselective organocatalysts of the Hajos–Parrish–Eder–Sauer–Wiechert reaction
作者:Stephen G. Davies、Angela J. Russell、Ruth L. Sheppard、Andrew D. Smith、James E. Thomson
DOI:10.1039/b711171a
日期:——
A systematic study of the effect of substitution within the β-amino acid framework indicates that both β2- and β3-amino acids catalyse the HajosâParrishâEderâSauerâWiechert reaction with poor to reasonable levels of enantioselectivity. These results led to the evaluation of the conformationally constrained β-amino acid (1R,2S)-cispentacin, which catalyses the HajosâParrishâEderâSauerâWiechert reaction with comparable or higher levels of enantioselectivity to L-proline.