The novel compounds of Formula (I) have been found to be useful cytokine suppressive agents and therefore useful in the treatment and prophylaxis of disease states mediated thereby.
Cycloaddition of (N-alkyl-N-phenylamino)ketene with imines
作者:William T. Brady、Mohammad M. Dad
DOI:10.1021/jo00021a029
日期:1991.10
(N-Alkyl-N-phenylamino)ketenes were prepared in the presence of various imines, and a [2 + 2] cycloaddition reaction occurred to yield 3-(N-alkyl-N-phenylamino)-2-azetidinones. The size and electronic nature of the imine substituents were varied in order to probe those factors that influence the stereochemistry of the cycloaddition. The stereochemistry of the 2-azetidinone was determined by the substitution pattern of the imines. In general, the stereochemistry of the 2-azetidinone products are significantly influenced by the bulk of the N substituent on the imine. These results are discussed in terms of a two-step zwitterionic intermediate.
BRADY, WILLIAM T.;GU, YI QI, J. ORG. CHEM., 54,(1989) N2, C. 2838-2842
作者:BRADY, WILLIAM T.、GU, YI QI
DOI:——
日期:——
BRADY, WILLIAM T.;GU, YI QI, J. ORG. CHEM., 54,(1989) N2, C. 2834-2838
作者:BRADY, WILLIAM T.、GU, YI QI
DOI:——
日期:——
QUINOLINE-4-CARBOXAMIDE DERIVATIVES, THEIR PREPARATION AND THEIR USE AS NEUROKININ 3 (NK-3)- AND NEUROKININ 2 (NK-2) RECEPTOR ANTAGONISTS.