中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-丙基-1H-吲哚-2,3-二酮 | N-propylisatin | 41042-12-0 | C11H11NO2 | 189.214 |
5-氯靛红 | 5-chloroindole 2,3-dione | 17630-76-1 | C8H4ClNO2 | 181.578 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | 5-chloro-1-ethyl-2-oxoindolin-3-yl benzoate | —— | C17H14ClNO3 | 315.756 |
—— | 2-(5-Chloro-1-ethyl-2-oxoindol-3-ylidene)propanedinitrile | —— | C13H8ClN3O | 257.679 |
—— | 5-chloro-1-ethyl-3-hydroxy-3-(2-oxo-2-phenylethyl)-1,3-dihydro-2H-indol-2-one | —— | C18H16ClNO3 | 329.783 |
—— | 5-chloro-1-ethyl-3-hydroxy-3-[2-(4-methylphenyl)-2-oxoethyl]-1,3-dihydro-2H-indol-2-one | —— | C19H18ClNO3 | 343.81 |
—— | 5-chloro-1-ethyl-3-hydroxy-3-[2-(4-methoxyphenyl)-2-oxoethyl]-1,3-dihydro-2H-indol-2-one | —— | C19H18ClNO4 | 359.809 |
An efficient diastereoselective trans cyclopropanation of 3-alkylidene oxindoles with in situ generated α-diazo carbonyl compounds or α,β-unsaturated diazo compounds under metal-free conditions has been developed to synthesize 3-spirocyclopropyl-2-oxindole derivatives. The procedure is based on the 1,3-dipolar character of the corresponding diazo compounds under base-catalyzed conditions. The method has a wide substrate scope and uses easily available starting materials.