Diels-alder reactions with cyclic sulfones: VIII. Organic catalysis in the synthesis of spiro[1-benzothiophene-4,5′-pyrimidine]-2′,4′,6′-trione 1,1-dioxides and 2′-thioxospiro[1-benzothiophene-4,5′-pyrimidine]-4′,6′-dione 1,1-dioxides
作者:E. E. Shul’ts、G. N. Andreev、M. M. Shakirov、N. I. Komarova、I. Yu. Bagryanskaya、Yu. V. Gatilov、G. A. Tolstikov
DOI:10.1134/s1070428009010126
日期:2009.1
from 2-methoxybenzaldehyde and thiobarbituric acid) in the presence of (−)-ephedrine or L-4-(tert-butyldimethylsiloxy) proline gave the corresponding 2-thioxospiro[1-benzothiophene-4,5′-pyrimidine]-4′,6′-dione 1,1-dioxide with an enantiomeric excess of 80%.