We report a highly efficient and selective catalytic system, ABNO (9-azabicyclo-[3.3.1]nonane N-oxyl)/HNO3, for the aerobic oxidation of substituted furans to cis-2-ene-1,4-diones under mild reaction conditions using oxygen as the oxidant. The catalyst system is amenable to various substituted (mon-, di-, and tri-) furans and tolerates diverse functional groups, including cyano, nitro, naphthyl, ketone
我们报告了一种高效和选择性催化体系 ABNO (9-azabicyclo-[3.3.1] nonane N -oxyl)/HNO 3,用于将取代的呋喃有氧氧化为顺式-2-ene-1,4-二酮以氧气为氧化剂,反应条件温和。该催化剂体系适用于各种取代的(单-、二-和三-)呋喃,并耐受多种官能团,包括氰基、硝基、萘基、酮、酯、杂环,甚至甲酰基。基于对照和18个O标记实验,提出了氧化的可能机理。
Novel polycyclic fused pyrazole compounds useful as antiinflammatory agents and preparation thereof
申请人:STERLING DRUG INC.
公开号:EP0102404A1
公开(公告)日:1984-03-14
@ The compounds of the formulas
where R and R' are lower-alkyl possess glucocorticoid activity, and are prepared by reacting the compound of the formula
with the appropriate dienophile.
@ 式中 R 和 R'为低级烷基的化合物具有糖皮质激素活性。
其中 R 和 R'为低级烷基,具有糖皮质激素活性。
与适当的亲二烯反应制备。