Partially Saturated Indeno[1,2-<i>b</i>]indole Derivatives via Deoxygenation
of Heterocyclic α-Hydroxy-<i>N</i>,<i>O</i>-hemiaminals
作者:Hans-Jörg Hemmerling、Guido Reiss
DOI:10.1055/s-0028-1087983
日期:——
A series of 3-aminocyclohex-2-enones were reacted with indane-1,2,3-trione monohydrate (ninhydrin) yielding 4b,9b-dihydroxyindeno[1,2-b]indoles that were deoxygenated to indeno[1,2-b]indoles.
Cross-dehydrogenative regioselective Csp<sup>3</sup>–Csp<sup>2</sup>coupling of enamino-ketones followed by rearrangement: an amazing formation route to acridine-1,8-dione derivatives
作者:Rajib Sarkar、Chhanda Mukhopadhyay
DOI:10.1039/c5ob02655e
日期:——
A new general method for the synthesis of acridine-1,8-diones through CDC coupling of enamino-ketones followed by rearrangement has been developed. This is a Cu(I) catalyzed procedure, based on the crossdehydrogenativecoupling of the Csp3–H bond with the Csp2–H bond of enamino-ketones followed by rearrangement to acridine-1,8-diones in the presence of PTSA under an aerobic atmosphere. The synthetic
One-Pot Synthesis of 3-(Guaiazulen-3-yl)dihydro-1H- indol-4(5H)-ones via Domino Reaction
作者:Dao-Lin Wang、Jin-Juan Xing、Lin Liu、Lu Zhang
DOI:10.3987/com-19-14165
日期:——
A facile and efficient one-pot procedure for the preparation of 3-(guaiazulen-1-yl)dihydro-1H-indol-4(5H)-ones by a catalyst-free, threecomponent reaction of guaiazulene, methylglyoxal and enaminones undermildconditions in good yield is reported. The indole nucleus is probably the most well-known heterocyclic compound, a common and important feature of a variety of natural products and medicinal
A new series of β-enaminocarboxamide was synthesized via the addition of chlorosulfonyl isocyanate to β-enaminones. The prepared intermediates were converted to corresponding β-enaminocarboxamides by removal of the chlorosulfonyl group using methanol. The resulting compounds were obtained in excellent yields in the range of (80–92%) and were characterized by 1H, 13C, HMBC, HSQC NMR spectroscopy, and